The problem is people are assuming GB was playing to tie, and need to get a TD with one attempt, then get the two point conversion, then hold off TB from scoring, then hope yhings went your way in OT. None of this should be considered a given.
Everyone forgets the GB scenario was 4th and, what, 8 by that point, while down by 8? If you are playing to win, you need a FG and a TD, and given you needed 8ish yards on one attempt, doing the FG then was the safer play.
The thing that didnt make sense to me was not going for the onside kick, though GB's special teams are so garbage they probably figured they had no chance.