I'm not a sports psychologist, just a fan, but I think there's a big difference between blowing a 9pt lead that you've actually maintained vs. hitting a few threes and giving up a few threes to go up and down in the span of a few minutes in a game that you've otherwise been trailing all night. I'm also not sure if I like the fact that Dallas retook the lead by jacking up some ugly looking 3s if I'm a Dallas fan.
I agree with you 95% - but still, a 9 pt lead with 3 minutes left is a nine pt lead with 3 minutes left.