Edit: Just to clear, my comment was genuine curiosity, especially as true tabula rasa seems to mean we would lose benefits such as the ability to learn spoken language. The racist/xenophobic comments by a poster below is unscientific nonsense and not what I was trying to introduce.
One reason is because it will forever be an argument against equality by some who feel superior. Because some might believe they have the right to take decisions for others based on their perceived superiority, even if differences are incomprehensively multidimensional and humans who usually think of themselves as superior they lack terribly at other dimensions.
No, more basic than that - if there’s no “tabula rasa” (and people have inborn behavioral traits), then hate groups will use those traits (no matter how poorly proven or unlikely to be found across an entire group) to justify their belief system.
Edit: Just to clear, my comment was genuine curiosity, especially as true tabula rasa seems to mean we would lose benefits such as the ability to learn spoken language. The racist/xenophobic comments by a poster below is unscientific nonsense and not what I was trying to introduce.