fwiw that kind of "omg they totally should not have made me read lord of the flies in middle school" rhetoric is very close cousins with "children should not be exposed to books about racism and trans people." you're coming from the same basic ideology that books written for children are somehow also unsafe for children, that books intended to educate will actually traumatize, and that what children should read should be heavily restricted and censored. it's anti-intellectualism babes.
like i get that you think you're just talking about old yeller or whatever book you must of read where an animal dies and it made you sad when you were 9 and for some reason as an adult you can't let go of that, but this is word for word the same exact argument people will make for demanding libraries pull books like julián is a mermaid. i am not exaggerating.