I think you overestimate the effect that would have on the kind of people that most need that sort of humility.
Look at what happened with William Shatner and Jeff Bezos when they came back from space. Shatner started to say something about what an impactful experience it was, but Bezos cut him off and was like “Woo! Partay!” and switched his attention to a magnum of champagne.
I met someone a couple years ago who was a U2 pilot (which are still in active service). He'd flown F-16s until he reached the point in the promotion ladder where flying stopped, then switched to U2s to keep being a pilot. After hitting 20 years, he was taking his retirement and training to fly Grumman S-2Ts with CAL FIRE.
Very down-to-earth guy who knew what he wanted and made his choices. Didn't at all seem like the sort to find edge-of-the-atmosphere flying a mystical experience.
Jeff went up two flights earlier, in July 2021 on NS-16. Shatner was on NS-18 in October.
I don't know if it's a thing that wears off, if Bezos was just in business-mode the entire time, or just didn't want someone monologuing right after getting back.
Look at what happened with William Shatner and Jeff Bezos when they came back from space. Shatner started to say something about what an impactful experience it was, but Bezos cut him off and was like “Woo! Partay!” and switched his attention to a magnum of champagne.