I think a mistake of trying to hyperoptimize a healthy lifestyle or micromanage productivity hacks to the point of spending a lot of their attention on new productivity hacks, is probably the bigger mistake than getting overweight as long as the overweight person puts as much of their brainpower as possible into actually irreplaceable cognitive achievements. And long-term health is only important if you care a lot about living for very long.
I think a mistake of trying to hyperoptimize a healthy lifestyle or micromanage productivity hacks to the point of spending a lot of their attention on new productivity hacks, is probably the bigger mistake than getting overweight as long as the overweight person puts as much of their brainpower as possible into actually irreplaceable cognitive achievements. And long-term health is only important if you care a lot about living for very long.