I used to think this way. I am a service plumber. I'm at the point where every plumbing company is hiring. If a customer wants to be disrespectful to me, there is a fine line where I am not going to put up with their shit. Pun intended. Hell.. I'd probably get a raise if I were fired.
I'm not saying a yelling match will be involved, thats not my style, but man I deal with entitled people on a daily basis. Most recent was a woman who called for repairs. We told her the hourly rate and about how long it will take. We told her it would take about 3 hours + parts. I finished in 2, with way less parts than I thought I would need. It was a 30 minute ordeal between calling the office and negotiating prices.... She thought that was too much money, even though she agreed for even more billable hours and I finished the job faster than expected.
It's hit or miss man, and its the worst part of my job is dealing with customers.. Yes, I said that, dealing with literal shit half the time is not as bad as having to deal with some of the customers out there.
What's a job you couldn't get paid enough to do?