You say this because you assess all possibly determiners that ultimately decode whether or not someone feels that talking to a girl will yield the results/ currents that will give them what they are positive of, or not.
Being confident to talk to girls has to do with people's standards and expectations of success.
To be confident, and selected implies the unworthienss of al lothers, for why will you be the one she chooses if all people are equal? There must be distinction.
Different mental forces compounding on a person's mind come into play.
You have taken your personal stance on the situation that confidence is genetic, because you are cross referencing, and deciding what is the ultimate determiner in how a person talks to women. Doubtlessly you have seen that completely ugly guys are confident in talking to women, while other people's self criticism/ examination of situations make it not so.
You are looking at all possible situations, and trying to find the main determining factor amidst all in their stance of talking with girls.
You're looking for the trunk on a tree chart when it comes to what determines confidence. And based on all the events that you've deduced, then it's just... genetics.
I would mostly agree.