That trait didn’t evolve because it wouldn’t be a survival advantage. Because then you wouldn’t be motivated to do anything, and therefore wouldn’t (survive to) reproduce.
Any ancestors that happened to have a tons-of-dopamine-all-the-time “adaptation” would have had no motivation to eat or mate or anything else, so they’d have been rapidly out-bred by others who had to eat and mate and accomplish stuff in order to feel good.
Latest Answers