How mental illness will save us

In clown world, only insane people are crazy enough to tell the Truth. But what happens if crazy people are removed from the gene pool? Would we then be left with only sheep? Well Yes, this is what i'm arguing and I believe that eugenics practices could have detrimental effects on society. This is because the most edgy people, that lead the charge against authoritarians, will no longer exist if they are removed from the gene pool