Nope, it sure doesn't! Not in the "Oh that is a GG" sense of the word.
Doesn't matter how you identify, this whole "confidence helps you pass" thing is a myth.
So what good does it do?
Well, I am a non-passing TS, by and large. However, I go out as Erin, go wherever, and no longer have the concern of "do I pass?" I do not care any longer.
And ya know, except for the smallest minded people, no one bothers me or looks at me twice.
I go to school as "Erin", in fact I hate being seen without my hair and makeup done. They all know I am MTF TS, no one cares. My friends don't make an issue of it. No one does.
What finally happened was after a rude client, I got really mad, but then I just quit caring. I accepted myself fully. I will no longer suffer small-minded bigots.
I know this has been poured over time and time again, just giving my own testimonial. I am out there. I do not duck in the shadows when I see someone coming. Broad-ass daylight I am just out there living my life. Bra, makeup, hair done, whatever.
Self-acceptance will gain you a confidence that cannot be stopped. It took me almost 13 years to get to this point. When your gender presentation no longer hinders your life, the trepidness stops.
I have seen very unpassable TG out there who are not the least bit worried about "do I pass?"
Confidence comes with the inability to worry about "passing", assuming that passing just isn't an option.
If we ever met me real life, you would meet Erin. And she would be standing tall and proud of who she is.
I read on FB - "If you truely believe in something, others will have no choice but to go along with it. Even an ugly stripper makes a lot of money"