In every movie (just about every scene) Statham is beating the living s$it out of someone, a lot of the times multiple people. The characters he plays are the most aggressive, dominant roles out there. He does pull off the male pattern baldness look quite well (good facial features and great physique) but I think women are more attracted to the character he plays and the thought of a guy like that, rather than him. We're all still animals deep down. Women, whether they care to admit it or not, are still attracted to the alpha male, "king of the jungle" type. The aggression he displays in every scene is the catalyst; without it I don't think he'd even be on their radar. Imagine if he tried to switch it up and not play the action hero anymore. If he went for a career in romantic comedies he'd be out of hollywood in a year.
If he had a full head of hair I do think he'd be cast in a lot more diverse roles (right now its purely action, barely any comedy and not much romance). With a full head of hair he'd be playing the next James Bond no doubt. I don't think they'd ever cast a NW5 Bond though... but I could be wrong (I think he'd make a great bond and would love to see him in that role). I do like his movies, however, every time I watch one I think that in real life, if anyone acted like the characters he plays they'd be doing 25-life for manslaughter / assault with a deadly weapon etc. Still that's the who we're supposed to live up as bald men.