My mother taught us all that 'if' we were nice to women, they would be nice to us.
I am sure she knew that was an obvious falsehood but she didnt tell us that.
As did mine, my understanding is it's fairly common, though in my case I feel like it was probably genuinely good intentioned since my mother went and married the "nice guy", not in the manipulative xkcd sense, but in the genuinely nice sense.
I'll also add that a lot of people who get dropped into this "nice guy" category, probably don't fall under either extreme. i.e. they are not amazing nice human beings who are way kinder/gentler etc. than everyone else, and they are not crazy and manipulative either...
They are just timid and naive, they are nice because they know being nice will allow them to avoid conflict and awkward situations. This was the group I used to fit into, and I feel like when you think about it, it's obvious why this group isn't particularly attractive.