Is eating healthy a scam?

I can go a couple months drinking little water each day, maintaining a ridiculous high sodium/carb intake and have just as much energy from drinking tons of water eating veggies, fruit, nuts, and seeds each day. The two diet don't seem any different effect wise, I sleep just fine between the tow. My teeth are fine, my wounds heal fine, my hair grows normally. My skin/hair look just as sexy you know and aside from hearing it is unhealthy I feel just fine and known other people who have done this for decades and are just fine and dandy. Plenty of people I know in their 80's still eat like this drink like crazy and smoke 1-2 packs a day. So what is the point? I find if you ever do rarely feel off maybe drink too much, or too many drugs just drink some OJ and you'll be running around again in an hour or so.

ALSO I AM SKINNY AND EVERYONE I KNOW IS TOO, some almost unhealthy skinny cause they don't do exercise. When I didn't I was 80 pounds too lol, now 160 as I exercise a couple weeks every few months. Exercise is over hyped too you really don't need to go every day to keep in shape unless you want to build and maintain strength. I eat like 10 pounds of crap a day and my waist is fantastic, I know other people too that can do the same just shit it out.