Is it normal i have this opinion on aliens visiting our planet?

I can address each of your concerns.

Extraterrestrial microbes are exceedingly unlikely to have a devastating, if tangible at all, effect on terrestrial life; terrestrial biology is essentially manifested upon chemistry acting as a reproducing, perpetually evolving coding language and extraterrestrial microbes will almost certainly be "programmed" in a somewhat, if not entirely, different coding language.

This limits potential interactions and essentially renders the two systems incompatible with one another. A decent analogy to this incompatibility can be seen with computer viruses and varying operating systems. Linux OSs are often seen as virtually immune to viruses (not _entirely_ true) and, while it's true that they are inherently more secure than Windows OSs, this essential immunity is primarily because the majority of computer viruses are designed to infect the more popularly used OS; their instructions are meaningless on a Linux OS.

We don't know that extraterrestrial life will be based on DNA or RNA. We don't even know that it will be based on carbon; silicon-based life seems viable for example. It's almost certain that, at the very least, alternative-chirality biomolecules would suffice. On Earth amino acids are generally of the L form and sugars are of the D form. Even such a similar biochemistry as one simply substituting amino acids of the D form and sugars of the L form would be incompatible with known life despite simply being an alternative stereochemistry.

There are also possibilities such as arsenic acting as an alternative to phosphorus or ammonia acting as an alternative to water for a solvent. The point is that it's very likely that extraterrestrial microbes will be incompatible but for good measure let's imagine these hypothetical microbes just _do_ happen to be carbon-based, typical chirality, water-using, DNA-coded, etc.

Even if they "speak" the same language and are technically compatible, they're still shaped by a completely different ecosystem and game of natural selection. On Earth microbes target particular proteins. The proteins are arbitrary in every way aside from being human-specific, etc. They evolved alongside us. Even life of the same base coding would be very poorly optimized to affect us due to its variant evolutionary history.

Because of these things many scientists believe the chance of an issue is outright zero. I wouldn't go that far though; while it's _exceedingly_ unlikely, such microbes could hypothetically create an issue by sheer chance rather than traditional evolution's will. Still I feel you can safely put this concern to rest.

This leaves your other concerns about the intentions of the actual extraterrestrial intelligence in question. As you alluded to, meetings between two intelligences with a vast technological disparity has historically rarely ended well for the more primitive intelligence. But not all trends are perpetual and luckily for us, an extraterrestrial intelligence capable of having traversed an interstellar distance has without a doubt already developed _much_ simpler (even if still somewhat alien to us) technologies along the way.

This is technology that negates essentially any motive for harming us whatsoever. Contrary to what was once believed, Earth isn't particularly special; it has nothing that can't be found in greater abundance elsewhere, including water. There are also almost certainly countless other habitable planets and an intelligence this advanced could also simply terraform uninhabited planets with ease if they hadn't already opted to live in a mobile space habitat.

Resources and real estate aren't an issue. Earth has nothing particularly unique to it aside from the existing life itself. So slavery as a motive? Not a chance; they would long have been a mostly automated, post-scarcity civilization for which organic slavery would be an enormous step down in terms of productivity. If they even went out of their way to meet us, they almost certainly at worst only care about logging our planet and various species thereof into some galactic Wikipedia and at best are being friendly to their neighbor along the way.

Even if you weren't particularly empathetic or peaceful, there's simply no motivation to go out of your way to wreck what in the grand scheme of things amounts to insignificant, little Earth unless you're an ancient species with a phobic policy of terminating budding civilizations before they're spacefaring out of fear of their future actions. This, however, seems unlikely. As far as extraterrestrials go, I think the bigger threat is a superior intelligence that doesn't even notice us and just happens to have some galactic rearrangement ideas, similar to humans paving roads over anthills.

but dis alien chik was kinda hot doe dawg :3

I don't think the idea that we would ever be a threat to them, and so that they should wipe us out just in case, would be laughable to them. So I don't think they'd kill us.

I doubt they'd try to communicate with us either though, since we'd be just too stupid for them. It'd be like us trying to communicate with insects, we wouldn't even think of the idea because it's just ridiculous. We'd either pass them by because they wouldn't interest us, or we might stop and study them out of curiosity.

So I think that's the most any aliens would ever do with us. And just like how the insects are unaware of us and how they couldn't comprehend our intelligence, that's what it'd be like with us and the aliens watching over us.

Best case scenario is that we are the first species to make it this far.

Statistically we could be so rare that we are the first. It's not hard to find life. What's difficult is finding inteligent life that doesnt get wiped by an asteroid, or solar flare.

If aliens were to come to earth, you seriously think they're going to say "alright, I'll just head out then" because people beg them to leave? Lol.

Maybe the aliens will find that they cannot fight the common cold? You never know. 🤔👽