The sexualization is not a problem on its own the objectification that often comes along with it is as well as the "unspoken" rule that only allows conventionally attractive people to be viewed in a sexual context.

People don't lose their personhood by being, acting or shown in a sexual context but many do absolutely not view it that way.

The problem i see is that since this mostly happens in visual media without context all meaning it could have is more often than not lost. If sexual content was created with a positive attitude we would see much more diversity. It is very obvious that it caters to people objectifying the protagonists and therefore its not that easy to blatantly approve of it.

This should off course not translate to shaming people in general but it should trigger nuanced debate and action.