is it not enough to just focus on high level objectives like what you you, when you eat, when you sleep, your social activities, and reducing high level stresse

is it not enough to just focus on high level objectives like what you you, when you eat, when you sleep, your social activities, and reducing high level stresses? it's kinda cool reading about the really indepth analyses around health, but they strike me as overkill in some ways. I'm probably bias by my own lifestyle howefer