I think those are people who underestimate kids. My books come completely out of kids' experience and my connection with kids. Kids should understand the real fairy tales first. They should read them all. Or the same with fables when Squids came out.
Kids can handle that.
They can see the distinction between a parody. Maybe they don't get it all. That was a classic when I first started teaching. I went slower and slower until pretty soon we were dead in the water and nobody was excited about anything. But it works much better to get up to speed and whip along.