Yeah, I'd say you're totally off.
Taz's biggest point is that if you know practically nothing about a subject, then don't say anything until you do. After all, how can you disprove evolution (or physics, or geology, or chemistry, or any other science) until you actually understand what the other side is saying?
It also saves one from making a total fool of one's self.
I think you will find that Taz (and many others) does care about furthering the knowledge of other people. Not necessarily for "selfish" reasons (such as feeling good about yourself), but rather, for destroying one more idiot.