Back inna day, my highest rate of success with women was with them super fine ass chicks for the very reason I bolded:
Niggas simply wasn't approaching them.
Nearly every extra fine broad I ever got digits from in a club would tell me that I was the first and only cat that tried to holler that night. An OG put me on to game like that at a corner store once when I was about 19. Fine ass broad around my age walked in the store, all the niggas in the spot admiring her and talking under their breath. OG saw me checkin her out and told me to go holler. I was like "Nah b, chick that fuckin fine got a man" and OG said to me "Nope, I doubt it. Go holler at her and if she got a man I'll pay for your liquor". Went out and caught her in the parking lot, spit game and got the digits easy as hell... Like waaaay too easy. Went back in and told OG and he was like "The problem for chicks that look like that is everybody assumes they got a man, just like you did, and because of that nobody hollers at them chicks except the one cat that knows what time it is."
After that I was always the dude hollerin at the finest chick in the club. And it would appear as if that's still the case today. Dudes ain't hollerin 'cause they assume these chicks got a man already.