I'm curious, if we take the failure rate of responsible protected sex, post-vasectomy sex, etc, for the planet... ... does that even start to contribute to rep

I'm curious, if we take the failure rate of responsible protected sex, post-vasectomy sex, etc, for the planet... ... does that even start to contribute to replacing the existing population, or is it a statistical blip? Is this just a dead end you're trying to lead me down?