I highly disagree! A profetional keeps their bull to themselves and I don't work with "models" I work with actors! They're used to being bossed around by a derctor and they have to have people skills to do their job so all works out well. (Plus I photograph other artist that will help me realize some of my vitions.)
I still will always prefer working with animals rather than people. I do work with people on occasion, but I find more serenity and piece of mind come to me from working with the non-human. That's just how it is.