In crypto, its justified. Crypto is like flying a plane. You can't do it just because you read lots of books and try really hard. Extra smart people have very little advantage over those of average intelligence. Most importantly, due to the nature of the beast, the first mistake is the last. It doesn't matter if you get everything right for 99.9% of the flight and only make a mistake during 0.1% of it, the result is still a 0% success.

Pilots are also a bunch of elitist snobs. I wouldn't fly with anyone else.