Why are movies for women so poorly written?

Rating: 1/10 (26 October 2018)

I, as a woman, watched this movie out of curiosity. I was never interested in it, but I want to see what the hype was about. I'm still questioning what the hype is about.
So the main character Christian Grey is a young rich corporate owner, yeah how likely is that? Considering all he thinks about is sex all fricken day. They don't really elaborate on his intelligence and wit that help him create the business he owns. They could've done that in 5 minutes but whatever.
Ok so let's focus on what the main story is about. The girl they picked for the story is the. absolute. WORST. Why would they pick a VIRGIN to somehow all of a sudden be interested in BDSM?? Literally she's in it for the money Mr. Grey somehow makes.
Those two things could have been different, and this movie may have been a little bit better.