I don't know where he works or the company's circumstances, but in most cases, only a small tech start up that values youth over experience (or is on a shoestring budget) will appoint someone in their early 20s to an executive-level position.
I dislike that this conversation became about me but:
They'll usually do that when he's the most experienced person in the company (like I was and am).
I've been working since I was 18, not 22. That makes for six years rather than the usual two, and the first 5-10 years of a career are pretty impactful for everyone.
Further, they were very dense years spent studying on my own time and working a lot of contracts.
I didn't sit in a junior position at a large corporation, I've had enough time to become a decent backend engineer in my own right but also develop a decent specialization. In addition to that, my contracting and consulting background has made me somewhat less provincial than when I started so I'm capable of relating to business needs as a C-level needs to.
I don't question your capacity to perform your job without knowing you, please afford others the same respect. I was trying to talk about the prejudice in the industry, not have it projected against me in the opposite direction. (Against younger people)
And yet they appointed a 24 year old as CTO. Better pack up your stuff, since you refuse to tolerate it.