[knubie]

Conservative parents don't necessarily produce conservative children.

[neverywhere]

But papers do indicate that there is a genetic component to political ideology: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4038932/pdf/nih...

Your argument is akin to a global warming denier saying that yeah, but some days are still cold. Yes, there will always be variation.

[knubie]

That's not really analogous. I'm just pointing out that there is an underlying assumption in your argument that may or may not be true.