Most of the people I work with (professionally and personally) are perpetually self-critical despite being very intelligent and more than capable. The humility comes from growth over time and being able to remember doing work they'd consider terribly flawed today. If you're working with arrogant people, they're probably not growing and it'll make it harder for you to as well.
I took it to be more about nerds online. I haven't met too many people face to face that are even a tenth as rude as 90% of the people I see online. Of course, I arbitrarily picked those numbers. I'm going to point that out before I get flamed.
Louis CK touched upon this in his "Oh MY God" show on HBO. Empirically speaking, people tend to act with less accountability when they're inside of cars, behind protective barriers, including the internet.
Most of the people I work with (professionally and personally) are perpetually self-critical despite being very intelligent and more than capable. The humility comes from growth over time and being able to remember doing work they'd consider terribly flawed today. If you're working with arrogant people, they're probably not growing and it'll make it harder for you to as well.