If you're truly fit or have a good metabolism you can pack away whatever you want because in reality, it won't make much of a difference.
I am both and I eat whatever I want, and have never had anything more than a cold.
It's a shite life having to "get used to" eating foods you don't particularly like, and no matter how you square it, we all end up a pile of rotting flesh and decaying bones or ashes eventually so live how you want and eat what you want. Getting fixed upon nutritional information and obsessing over it, is a waste of a life and ironically, contradicts the original purpose.
You may think that, but generally, no. You are young and your body is not even in its prime. It's just fresh and brand new. Metabolism and immune system is so strong when young and I know this from my own experience, even when I still was healthy when I was young.
Your whole post was redundant. Because we will eventually die means that why eat healthy and maintain the high powered machine you are efficient and healthy? That's like saying why still go to the gym when you are in extremely good shape? You need to continuously work out to maintain that physical fitness.
I can share from experience than when I use to eat fried chicken (saturated fat), starburst and soda (unnecessary carbs and sugars) before soccer practice that I felt lazy within the first 10 minutes and tired out quicker than normal as compared to when my meals were consistently moderate and very healthy I would outperform and last 8x longer than I would just because I was hydrated and fed energizing foods that benefited me in the latter. I would then last 20x longer when I physically trained.
You can't just not eat healthy because your point is that we all will die soon. Obviously. With age comes limits. Meaning so many things inside our body starts to deteriorate and shut down, getting old after a while. You won't keep that childhood energy you always had never wanting to go to bed but instead continue running amok among the playground. It's inevitable, but by eating healthy and exercising daily prolongs that.
You feel energized and young and so alive when you treat your body with respect, like a temple, not an amusement park.
Eating healthy also doesn't mean eating Kale all the time and obviously we all don't like Kale. (I don't though, it's bomb). There are ways to acquire taste but eat healthy at the same time. It's called cooking. Finding recipes that give the nutritional value but pack that elegant taste you love so much.
Maybe if you get off NB and stop eating oreos all the time you can actually eat some real home made cookies that are baked with the healthier ingredients than that mainstream processed crap they put in oreos. Don't eat baked goods though, they have no contribution but empty carbs to the human body. They are just simply pleasure food.
BUT AGAIN. To each their own. You live your life the way you want, but you can't say something that is incredibly not true. There is also a saying in which I believe that illness such as basic colds and what not are just psychological. Your mind telling your body to get sick.