When I was 13 I had a paper route. It was almost all modern except three or four households that still used the collection model. The paper company would take their subscriptions out of my pay and send me to collect and keep it and any tips. I decided it was easier to just take the pay cut than knock on those doors.

The whole concept still makes me intensely anxious and I would sooner quit a job than begin dealing with customers directly.

But I'm hella good at my job and I'm quite comfortable not being that kind of person. As you said it's not for everyone.