Keep yourself in the game as long as you can. Kicking the PAT and getting within 2 scores is better than missing the 2 and staying down 3 scores. Yes, you have to make them either way once you're down 30.
Who cares about "keeping yourself in the game." Try to win. The best chance to actually win is to go for 2 early. You don't play to "keep yourself in the game," you play to win the game.
If you miss the 2-point conversion the first time, you know you need to play for 3 more scores, and you'll play accordingly. But if you miss the 2-point conversion the last time, you probably didn't leave yourself enough time to have another possession because you're playing it as if you only need 1 score. You want the extra information.