I wonder if this is a misattribution of Zuckerberg’s quote:

“I want to stress the importance of being young and technical … Young people are just smarter. Why are most chess masters under 30?" he asked. "I don't know… Young people just have simpler lives. We may not own a car. We may not have family."

Of course, he said this in his twenties and he may have changed his tune. As far as I know, he hasn’t handed the reigns of Meta over to a twenty-something just yet.