I guess ill state the obvious. This thread was started with the sole purpose of making fun of kirk for punting in that situation.
5 minutes is not enough time to get a stop, score, get another stop, and score again. Any idiot in the world knows this and Kirk still couldn't muster up the courage to go for it. I guess he must think the odds are better of getting a quick turn over or getting an onside kick than they are of picking up that 4th down conversion.
That means he has a really messed up version of "playing the percentages", or he simply "gave up". Those are the only two possibilities.