There is so much dumb bullshit in the Pokémon universe that is not explained and will never be explaned. What’s it like inside a Poké Ball? Do people eat Pokémon? These are questions that, when we have asked the developers, they have been unable to answer. Not helping are a new addition to Sword and Shield, Poké Jobs.
Source: Kotaku – Pokémon Jobs Are Kind Of Messed Up