Better than what? It's such a taboo to some people, most of us really enjoy what we're doing and the money helps!
So many people can't understand the emotional barrier around sex, so obviously can't understand fully what really escorting is.
This guy honestly needs to see that he's involved in escorting as much as you by providing you with a client, maybe he should think that he may "be better than this... " instead of putting you down!