I have heard horror stories about people showing up at jazz jams where newbs basically get laughed off the stage. Adam Neely talks about places in New York where if you show with a fake book you get told to go home.
Sure, that is intimidating, worse it's discouraging, but for people, music is a competition where you try to show off how hip you are and score cool points instead of something you get joy from, and then there are always snobs.
If you've seen the film Whiplash, which is an entertaining but totally over-the-top and unrealistic portrayal of music education, you can imagine that intimidating environments definitely exist out there.
There is also the example of the recording of Buddy Rich cursing at his band, calling them every name in the book. Would that intimidate me? Nah, I don't rely on music to pay the rent; I'd have told him to F off and walked away. But for the guys on that bus, who needed the work and had to put up with that abuse, it must've sucked.