Imagine if the Pokémon culling was apart from their laziness also to get Pokémon SwSh on the cheapest Nintendo Switch cartridge as possible and that's why the character models as well as the textures are so shit as well.
Game Freak knows the majority of their players buy the Pokémon games physically and they don't wanna deal with the hassle of chopping the game up and needing a download to run the game when it's below 10GB because then even Nintendo might have something to say.