>>212309589 (OP)same reason why you'll never have a mature western animation film be a blockbuster in cinemas and then sweep the award shows , like they do in Japan or in other countries.
Same reason why 90 years of comic book franchises -had- to be adapted into live action movies, and the animation films/series have to be on like Fox Kids on Saturday morning and direct to VHS.
Same reason why even "mature" animation in the west is just them saying fuck and shit and having ironic fart jokes about current events.
Animation in the west is forever seen as media for children, we rarely call it animation it's always just "cartoons" which is what 99.99% it is. There will never be a western version of Guts or Baki or Grave of the Fireflies or Demon Slayer or Kimi No Na Wa or Spirited Away.
Lord knows there will be plenty of attempts at live action adaptations, especially on neflix, cause that's all we're good for.
And to be clear I absolute love (some) western cartoons like especially 1990s Simpsons and the original run of King of The Hill as well as early Family Guy as well as Futurama and something like Clone High or Home Movies. They're all excellent sitcoms though, where obviously it's all about the humor and not so much displaying animation as an art form. It's timeless (mostly) flawless humor though. I'll happily rewatch all those over something like Friends or Seinfeld.