Apparently you’ve never encountered one of those cretins.
I have and I get where you are coming from.
No, no one should hit a Flight Attendant, but many of them could use some customer service training.
That goes for many airline employees. Since 9/11, they've been able to deal with all customer service issues as if they were terrorist activity.
I was visiting the Welsh government assembly hall and had to go through metal detectors. I emptied my pockets and stepped forward. A very nice fellow, dressed in a suit, asked me - “Can you manage without your belt?”
It took me a second to realize he was asking in a very polite way for me to take off my belt. Of course! I smiled, thanked him and it’s one of my favorite stories of British manners.
Then, I get back to the old USA and a rather rotund TSA person practically screams at me - “take off your belt!”