But you are still saying hat the genes we have are the same as millions of years ago. According to Darwin this is a rank impossibility - the law of evolution is change according to a mix of random mutations and changing circumstances.
I assume (correct if wrong) that you mean the 'hard-wired' idea that genes in our brain are exactly the same as then, and that they are so detailed that they can decide our behaviour now, with these 'switches'. No one have been able to prove that such 'switches' excist, they are just an idea - in the face of the many seriously working biologist who tear their hair and point out that genes can not express such detailed behaviour.