You learn a lot more from your failures than from victories, especially if the victories were easy ones. I know this is football coach, lame sounding ass shit. As trite as this sounds, it is true and I want to explain why.

Building up your skills approaching and seducing women is like fighting. You could have the cleanest, fastest, most powerful combos on a punching bag, but if you've never actually fought or sparred with anyone, all that is useless. You will lose your composure and likely fall apart as soon as you get punched in the mouth (source: Mike Tyson). Cold approaches with women and rejection are like sparring. This is where you will get jabbed at, beat up, hit with illegal shots, etc. And this is where you learn to keep your cool in the face of adversity. This will help not only with women, but in all aspects of life.

Once you have a decent skill set, think of what happens when a woman actually likes you. They will make things easy for you. However, women will not say "Hey, I like you. Here's my address and come fuck me whenever you feel like". There is pretense that needs to be kept; that you are the one taking control and that she is the one letting you take her. What they will do is set up a few hoops for you to jump through where you simply go through the steps and get her number, sleep with her, or whatever. Bear in mind that I am using the "jumping through the hoops" analogy not because I am implying that woman have control or power over us. What I'm saying is that in this case, they are setting you up for victory. This is where normal guys can barely jump through the hoops without knocking down the whole fucking set up like a drunken toddler. Most guys barely get through, some guys are so bad and display such a lack of social intelligence that the girl might actually change her mind.

This is where you come in. With your experience in keeping your composure and pushing forward with women who don't even like you, or women who are on the fence, think of what will happen here. You will come across as an uber confident stud. You will take the little hoops that she set up, rip them off the stand, throw them up in the air, back flip through that shit, land cleanly, catch it, and hand that hoop back to her without even breaking a sweat. This will make you stand out 10x more than any of the other guys she may have shown interest in recently. If she was attracted to you before, she will be wrapped around your finger now. This is the value of rejection/failure.