I don't think anyone wants Michael and Spock to have that kind of relationship, we just fear these writers doing it for shock value and clicks online.
I don't think it's that, I think it's just that a lot of viewers out there are incapable of imagining a male and female character having anything other than a sexual relationship. Or who want to project a sexual relationship onto any two characters regardless of gender or relationship, which is how we get fans who want the brothers in Supernatural to be lovers.
Plus, of course, it comes from viewers not knowing their Trek well enough to remember that "Amok Time" rules out any previous pon farrs in Spock's past.