The castle parks have always featured cartoons. Chip 'n Dale on MS and all that. But the only cartoon lands were Fantasyland.
Tomorrowland was about space, future transport, world travel (and some peculiar vintage DL attractions about paint, chemicals, future living, to get sponsors in). Frontierland about cowboys and indians. Adventureland, Liberty Square and New Orleans were populated by pirates, humanoid ghosts, dead presidents.
Only after the mid-90's were the castle parks cartoonified. For example, the Treehouse was turned into Tarzan's treehouse. The Three Mile Long bar was renamed after a cartoon character, Pecos Bill, with his cartoon mug over the entrance, where up until the late nineties, human gangsters were shot of the roof by human sherrifs. Mission to the Moon via several steps ended up as Stitch. Originally, it looked like a NASA control room there. A cartoon spinner was dumped into Adventureland. But AL always was populated by real people! Even if statues can sing and the animals behave oddly. The steamtrain at MS and steamship at the Rivers of America transport people, through human places.
A visit to a castle park is not you being Bob Hoskins following Roger Rabbit into the world of cartoons.
The MK's are not cartoon parks! They are environments themed to human places, that provide adult entertainment. Well stuff for the young at heart. Cartoons belong in Fantasyland and Toontown.