Because heaven forbid we teach kids that it isnt just about how much money we can bring home that matters.
Call me idealistic but I think it isnt a bad message for kids that when it comes to work, it isnt only about how much money you'll make out of it (still very impt, i wont disagree) but what good your job does for the community or other people in general.
Looking at the context of those 2 siblings and where Kota got his money from makes me more sympathetic towards the sister too. Basically you have Kota who just quit his 2 jobs saying that they can live off his winnings playing cosplay Pokemon from now on.
And I know many people have provided for their family with professional poker winnings, maybe MTG Pro Tour circuit, probably even sponsored WoW guild raid instance whatevers, and there's nothing wrong with that.
But for the kids watching Gaim, is that really something I'd want them to learn at this stage? That if you can make money off playing a game (in-universe Inves is still just a game regardless of the inherent danger present there, the people of that world are as infatuated with it like ours are with say, idk basketball?) there's no point in going thru school as well as looking for a job? If you want to play the game, play it because you really want to, not just because you can make money out of it.
As for the episode, I do love Kota so far. Here's a guy who when we first meet is working hard, wanting to be a reliable adult. 2 episodes in and he's quit his work playing Digimon gladiator "for the team". I want to see where the show would go with his character.
I like Kaito's principles too, a walking opportunity to bring the weak to stand up and become better/stronger (or crumble if they dont or are too chickenshit to). He's an excellent foil to Kota. Ofc one wonders why someone w such strong beliefs is out in the street dancing and not doing something more productive w his life.