It's possible it's actually the opposite. They don't note the people surveyed as feeling morally repulsed, just that's it's somewhat awkward. It's possible that a wider acceptance and availability of porn means that less people feel the need for pseudo-porn in their mainstream movies. I'm not Gen-Z (far from it) but I also find these scenes feel out of place and gratuitous in movies unless they add to the story in some way. I can easily find something far more arousing if I want, so why am I forced to deal with some scene that doesn't really add much to the story most times?