Kind of a shocking choice.
Isn’t this true though? Says more about Harvard than Summers to be honest.
https://www.swarthmore.edu/bulletin/archive/wp/january-2009_...
It's absolutely helpful for mental health, to show people that there's not some conspiracy out to disenfranchise and oppress them, rather the distribution of outcomes is a natural result of the distribution of genetic characteristics.
It's also unimaginative; having a variety of traits is itself good for society, which means you don't need variation in genetics to cause it. It's adaptive behavior for the same genes to simply lead to random outcomes. But people who say "genes cause X" probably wouldn't like this because they want to also say "and some people have the best genes".