Ehhh, can we stop with the silly, IMPRECISE percentages being thrown out here?? A pro football win probability thing or numbers pulled out of your butt aren't helping the conversation.
I don't think many of you know how win probability works. NO, if UNC kicks the XP and stops Clemson from scoring and makes it to OT, their win probability doesn't go to 50% or probably anything close to 50%. So get that out of your head.
It has to do with expectation vs what's happened and how that works. Clemson came into the game as a heavy favorite - a 94.1% chance to win (which they did). They're still a heavy favorite if the teams go to OT, because they're tied. I'm not going to pretend it's still 94%, but it's 60-70%, which means UNC has a 60-70% chance of losing in OT (yes, pulled from my butt, but actually based on something - Clemson's worst win% during the game when they were tied was 68%). Looking it up, teams get the 2-pt conversion ~40% of the time. So one could argue the odds are similar for UNC either way. Now, do you try the one-play, anything-can-happen route or risk Clemson's depth coming into play in overtime and possibly multiple OTs? Or risk Clemson's funky day being righted and they start curb-stomping you as they were supposed to?
You take the one-play shot. You stop tempting fate and try to steal the win.
This might help - think of a baseball player who underachieves the first half of the season. He's a career .280 hitter and in his prime, but at the all-star break, he's only hitting .240. Now, you know about regression to the mean, you know the law of averages points to him being truly better than that, and he is. BUT - HE IS NOT GOING TO HIT SO WELL THE 2ND HALF OF THE SEASON THAT HE GETS HIS AVERAGE UP TO .280 FOR THE SEASON. He is likely to hit .280 for the rest of the season, thus bringing it up from .240, but only to around .260 by the end of the season.
For this one game, UNC battled Clemson equally, but this doesn't magically undo the discrepancy between the teams when they kicked off to start the game. Clemson still has all those same advantages they did when the game started and they had a 94.1% chance of winning.