Dude, they're drawings. Not only that, they're hyper-stylised drawings. Like have you ever seen an actual child? Scratch that, have you ever seen an actual real life human?

If you can find me even one human that looks remotely like a character from Pokémon I'll consider your ranting and raving. Protip you're not gonna find someone with archway shaped eyes 3 times the size of their mouth.

"Oh but they're supposed to depict and symbolise a child," that's not how art works, it's up to the audience to interpret anything that does not closely resemble reality. Case and point I could draw a sexy af girl that could get anyone off, like so and claim that she's 5 years old but because it doesn't actually look like a person everyone can freely interpret it as whatever they want