Even fewer will get to a point where they might conceivably flash or onsight 5.12d (<0.5% of climbers if I had to guess)
I doubt there are more than 10,000 people alive who would consider free soloing 5.12d at all, and I don't think anyone else has free soloed a 5.12d big wall route.
Style matters too. Are you good at steep overhung routes, slabby vertical routes that require lots of balance, crack climbing, or even off widths. It is all kinda relative. I am a tall guy so powerful long moves are my preferred style. I have friends a foot shorter than me that can crack climb way better than I can. It is a great sport and there are accomplishments to be made at every grade and every step of your climbing journey. Try hard and people with respect you regardless of the grade.