I don't know if you are just jesting for the sake of conversation, but Maomao has seen far too much of the life in the red light district to have respect for it, other than to respect the people who are pushing through their lives despite living/working there. It's only the few topmost courtesans who must even maintain their virginity that are glamorous, in a certain manner. The rest are faring as they might, many succumbing to STDs eventually. The patrons are hardly all gentlemen, either. I'd say Maomao considers the customers mostly suckers.

It's not uncommon for people working at any place having much worse (=realistic) opinion of it than customers merely visiting it occasionally.

But then again, maybe I'm wrong. She is so jaded, like I said, that it's difficult to get opinions out of her, unless it's about food/poisons.