Therefore, if you accept the idea that one of a billion particle pairs would survive the annihilation process in order to keep the BBT
According to your rules, I can't. We don't have any observation of virtual particles surviving annihilation from the vacuum. I also don't care about the Big Bang theory here. It's in the trash.
Therefore, as the parity violation (of the order of 1 particle in ten billion) which refers to real particles, also refers to the virtual particles that had been created by VE.
Parity violation doesn't have anything to do with particles surviving annihilations.