This is a fun thought experiment, but I think it over dramatizes the reality. There's a huge potential set of humans, of which the current population represent

This is a fun thought experiment, but I think it over dramatizes the reality. There's a huge potential set of humans, of which the current population represents one infinitesimally tiny subset of that potential set. But there's a lot of people, and the fact that one of them is you is largely unremarkable. If it hadn't been you, it would've been someone overwhelmingly similar to you. In other words, we're not unique snowflakes. Humans are more alike than they are different, so don't get so excited about the miracle of your existence.