why do you think these people are sexualising minors, though? They could always create and consume such content involving adult characters, but they have chosen to draw children in sexual situations nonetheless. This brings us back to the point that the fiction we create reflects our real world values and such, at least to some extent. If these people want to view sexual content, there is a very wide variety of it involving overage characters, but they have willingly created and viewed sexual content of children. Fictional or not, why are people choosing to look at this stuff? They could be looking at adult content involving adult characters, so why are children getting involved? And going back to what was mentioned earlier about moral, would this not mean people think it's morally acceptable to look at and perceive children in such manners?
so no, not everyone who enjoys this content is going to go out and abuse real life children or find them attractive, but the fact that they like this stuff shows that they think it is acceptable to sexualise minors, and that in itself is problematic.
edit: btw please don't take this with negative connotation! If I'm sounding aggressive or anything that is completely unintentional