I presume the guys who are now airline pilots went that far. I presume the ones that are just personal pilots did not. I have no idea if the guy that flew fighter jets did or not.
Fighter jet pilots tend to be instrument rated. And they can tell you about the wash out rate. Instrument rating is probably one of the hardest things in the world, it not only takes smarts and instinct, but massive ego. Nobody who doesn’t have an insane level of self confidence would take a plane off, fly it to another airport using dead reckoning to get you close enough to the airport beacon to navigate by radio, and land it all without being able to look out the window (well almost all, you get a little bit of window action at the end of final approach).