Slight shifts in the distribution curve with regard to certain traits and a greater variance in the distribution (what he called "flatness") cause huge ratio differences at the tails of the distribution curve.
The tails of the distribution curve are where extreme performers are found.
Peterson kept pointing to that, but she just didn't get it.
She didn't seem to understand the math behind what he was describing.
Ironic.
<edited to add>
This interview is fertile ground for humorous edits.
The Internet is already having fun with it.
https://youtu.be/zN8cHVpcUMQ