If you can’t even follow the Mathematics of error margins when using one easy to measure characteristic as a stand-in for another harder to measure characteristic which is positively correlated with the former but not by a factor of 1 and whose correlation factor actually changes by the very action you’re justifying, and, even more more sad, have to resort to calling it “pseudo-explanation”, there is no point in engaging with you using logic because that’s not the level you’re operating at.

Enjoy your quasi-religious relation to your ideological beliefs.