Lots of shounen series have plenty of dreamy girls flocking around the male MC, so I guess it's the same.
I reckon most of the so called villainess series, plentiful in numbers, are shoujo or josei, but there have been some seinen ones as well. I bet shounen ones are there, too. With Mangadex down, it's considerably hard for me to check the various series I'm familiar with, so I'll just have to rely on my poor memory. Of course if you do have a shounen/seinen isekai series with a female MC, you won't as likely have the reverse harem going on, at least not nearly to the degree shoujo/josei would have. It's otherwise a harder sell for the intended male audience, who's usually not interested in a sausage party as a romantic thing. With the harem aspect lessened, the "dreamy" aspect will be reduced naturally.
Haha, yeah. According to my experience, in shoujo/josei, if the dude is handsome and dashing enough, sheer rape is nothing but a little bit forceful greeting. If the same happened in popular shounen/seinen, the author/publisher would receive death threats.