I think this may reflect that overall, sexual entertainment, as someone called it, has really infiltrated our society, in a very wholesale way. It's completely normalised.
In a way I'm not that surprised that some person might not really twig that some event like this is all that different than other examples. Overt sexualisation is all over the place, in advertising for a start, but it's endemic on television and in film as well. There are a lot of films someone might show to an adult audience without thinking twice that have sexual content that really is only there for "entertainment" which is to say, it's not necessary to see it for the story and it's not non-sexual nudity. It's sexualised and meant to give people some sort of a thrill.
When those kinds of boundaries become eroded, people will no longer have as much capacity to make judgements about this kind of thing.