I think following your logic it definitely makes sense...the only thing is that it's riskier to have hot female friends for the sake of hopefully being able to date one of them because you could get stuck in the friend zone. The guy does have the advantage of getting to know "more attractive" girls instead of hitting in random ones, and the girl has the advantage of knowing whether the guy friend is interested in dating or just a f*** (which is much harder to tell if it's a random guy).
For me its completely random. I don't care whether I know him or not, its just a matter of how well we get along, his morals, their goals and all that stuff. To me it's a craps shoot. Did you ask when I was single, do we get along, do I like you?
Though I'm going to put this bluntly- if the first reason a guy is dating me is because he thinks I'm hot or have great t*ts or a perfect ass he's not going to be dating me for long, if at all. I want my man to think I'm good looking, the best looking, beautiful, sexy and all that but that should be secondary to my personality, to our connectivity.