If you start out overpowering a girl because you assume she is a bitch, you can power-down and still have her understand that you are powerful but toning it down because YOU FEEL LIKE IT!
If you start out AFC with a girl, then find out she's a bitch, you are fucked! She will NOT believe that you are all of a sudden this powerful guy when you were that flower-buying dinner-taking non-kiss-or-sex-getting-PUSSY that she has been dating and pimping for your "friendship" since the beginning.
Bottom line is: if you start out as loser, you'll end up a loser.