Let's say it is normalizing that lifestyle to children. I don't think that's what is happening but I won't argue that point right now. Even if it is normalizing, it's not grooming. For it to be grooming, and I'm speaking broadly here, the purpose of the exposure is to give the adults involved an opportunity to prey on that specific child.
Which is why I said, for it to be grooming there has to be a lot more than a story about a parent taking their child to a show that readers find objectionable. To get to that next stage, the purpose of taking child is to prey upon them. That the people at the show use the show to actually prey upon the children.
Too often posters extend their disagreement with the existence of the show and with parents taking their children to the show into conflating that with an intent to abuse the child. And 90% of the stories that have been posted here never include any reference to an intent to abuse or actual abuse. It might be objectionable but it's not grooming. I said it's a fine point distinction but it's an important one. Although as I said elsewhere, not everyone is going to see the distinction.