I hadn't actually ever head the term "Gonzo" in anything other than The Muppets so I was unaware that type of horrific porn had a name - you say it's the most common form Dittany, but is it the most watched ?
If it is then yes, it's a huge worry, I would hope that most men , if they saw it would be horrified and appalled and wouldn't want to watch it, I know 100% that my husband wouldn't - it's about degradation and humiliation, not real sex.
We watched something called "porn week" once and it involved groups of male "fans" watching the production of porn films and snapping away with their cameras as the likes of Ron Jeremy were filming scenes - we both felt like we needed a bath after watching it, it was just so horrible, these sad inadequate men gawping at women being spit roasted, it really was very unpleasant and that was big business mainstream porn, in fact my husband said "turn it over , it's horrible" even before the first ad break.
If men do want to watch women being so badly treated then there is something wrong with them, no doubt about that.
I still think that there is a place for "ethical" porn though, featuring real, enjoyable sex - I don't see much difference between that and educational material tbh.