I too would skip reading such material to my child. But it wouldn’t bother me for the child to read it themself when they are older. It’s a funny psychological thing: reading aloud to someone risks carrying some perceived level of approval. A child reading it themself can toss the ideas around in their head, take time to process it, question it etc. and surely they can tell that the prose is whimsical and not serious.

“All white people are slave owners”

“All black people love watermelon”

“All jews love money”

“All indians love curry”

etc.

Even if you’re not picking on a single group, you can still be perpetuating untrue (and even potentially harmful) stereotypes.