there might be 3.95 billion women in the world, but then a lot of women here insist you shouldn't really approach at XYZ because its weird and how social circles are the way to meet which effectively narrows your dating pool to a even smaller number of women.

unless the man is conventionally very appealing asking out women in ones social circle will still be a numbers game and the majority of advances will end up with several "I don't see you that way" rejections.

and as much women love the warm social circle approach because it allows "vetting" from other girls, this also mean you're only a couple of rejections away from becoming "that guy".