No worries! You were probably just thinking that if he'd decided to get into politics, he could/would have been president many years ago. That seems intuitively valid.
To your last point, politics seems to be either for idiots (Biden, Pelosi, Waters, AOC, etc, etc) or people who've proven themselves in other professions and decide to give it a try (Regan, and others).
Finally, the great Thomas Sowell was on a higher level, and probably just didn't want to descend into the filthy muck of politics. And that's certainly understandable.
Cheers!