If I am hiring someone to deal directly with customers I could care less about their knowledge of the business or their experience. I can teach them all that. What I can't teach is how to be a genuinely friendly, kind, considerate person to my customers. They bring that trait with them. I won't get it.
Some people are good with machinery, others are good with numbers and some are good with people.
Those are the ones you want dealing with your customers. No company receives a bill in the mail for the cost of lost sales. In the service industries, image is everything. How you look is how you are. Here's looking at you kid.