>>714630286The thing is gachas are also popular with wage slaves in these asian countries. Japanese guys only have time to play on their phones during their lunch breaks or on their commute to and from work. Gacha allows them to do that. When they get home from their job they're too tired to boot up their goystation and stick with the simple phone game that is always on their person.
And here's the other interesting thing. These guys have a lot of disposable income because most of them are single and don't have families to raise. They're not playing other games and they're not buying other consoles, so that justifies them spending money on the gacha game which is the only game they have time to play. They don't have anything else in their life that makes them happy or give them meaning in between the miserable work hours. This game is their relief, as mindless and seedy as it is. That's why they don't mind gambling to get their waifu, because to them there is value in this game, more than others.