I agree with everything except this generalization. I was a shy nerd who (I thought) would make a terrible salesman until I started working at a reptile store. Turns out it's pretty easy and actually quite enjoyable. When the time comes for me to sell my own snakes, I -can not wait- to tell people about them and make some sales.
Additionally, I've heard of PLENTY of "snake nerds" who will hold onto an animal and sell it for more as an older animal rather than dump it for a low price. I will be one of these people as well.
I can't speak for everyone, but I think there are a few more Type A's out there than you are accounting for.