Considering their line of work, probably not. Although, as other had point out, in reality japanese av industry is lacking in terms of male actors. Usually because there is a lot of step they had to take to be able to become the one who do the "act". Therefore she literally doesn't have many...
Yeah, a few chapters back it is said that the robots are the child of humanity. They're meant to be humanity's successor, they one who stay after the human perished. It's kinda sad tbh.
I think the bald guy (seno?) obesession is more of a business stand point than anything. I believe a few chapters ago, it said that he is one of the important figure in gravure community, and it also said that how much money a magazine would get with marine haniel cosplay on the front page.
Kinda anticlimactic, but i guess is heavily implied ending. Plus, those strength talk she mentioned before, i guess that what she meant that she likes the strong guy. Not literally strong like bulking one, but someone who gives her strength.