There's quite a few problems with that: "Perfection" and "imperfection" are two sides of the same myth. Also (just for context) I am a 42 year old virgin with no interest in bloodline or raising a family of my own, in other words your clear attraction to it is not universal. And (this is just technical nitpicking) you forgot to add that I'm a woman or there'd be no woman carrying my third child or that I had not "put some swimmers on ice" in one way or other in order for your "ending your bloodline forever" to be true.

But to answer you: Yes, if that were the case that would be how this universe plays out, just like how every horrible detail of WWI and WWII played out. In short, this is the universe that begin with a particular Big Bang (or however it all began) and everything leading up to the drunk teen swerving and everything after it are the consequences. My life and your life (however they will play out) are not random, the future is the future of that Big Bang. We cannot know the future (kind of like Romeo and Juliet cannot rewrite the pages in order to know in the first act that they die in the third act) but nothing in the future is random just like nothing in the past is. There's no Choose-Your-Adventure to Romeo and Juliet.