I don't know why anyone wouldn't try and learn about the plants here. You aren't always near a PokéCenter when you or one of the Pokémon with you gets sick or injured, and buying all of your food from the stores takes a lot of money, so if you can find edible plants you only have to buy meat most of the time.

I just wish that the people who work at the stores could tell me what animal the meat comes from.