> don't really care how polite they go about it.

Does that apply to everybody or just customer service people?

How about your coworker, boss, teacher, spouse, children, parents? Say you make a mistake and they correct you by saying "Not like that, you fuckhead". That's no different to you than "Oh, oops, I think it's this way."?

Even a customer service person, if they correct you the first way, you don't mind?

A minimum wage worker (probably the other side of the ticket machine call) gets a lot of leeway, a well paid manager needs to do better.

I don't care that much about phrasing, not as much as others do.