system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why and how do unhealthy simple sugars taste better than healthier vegetables and produce?
gpt
Because they're only unhealthy in that humans can get access to way too much of them in modern diets. 

They are profoundly useful sources of energy, which your body needs to not be dead. For much of human history, there were not stores selling Snickers, and as such natural selection has rewarded life forms that avidly seek them out and continue living, necessary for most forms of reproduction.

Now that there are stores selling Snickers, natural selection hasn't had time to reward those of us who avoid cramming them into our mouths.