I'm amazed that intelligent people spend so much time responding to the ineducable.
I do it because I learn so much doing it. I'm not an expert on any of this stuff, just someone with an engineering college education. Learning things is fun and my biggest reason for participating here in the crevo debates.
Once in a while someone acknowledges in public that they learnt something from me and that they're going to adjust their views a little. That gives a real buzz.
I get private mail from lurkers about once a month telling me to keep up the good work. That also gives a real buzz.
In that particular example (that you originally replied to) I think the OP did learn something that he didn't expect. A seed has been planted that may or may not grow.