Does having a perfect regular season make it harder for a team to win the superbowl?

Since the pressure is greater for a 16-0 team to win it all than a 12-4 or 13-3 team, because if a 16-0 team doesn't win, they'll go down in history as a choke, whereas if a 12-4 team loses, it's because they ran into a better team. That's what made the mavericks' loss to the warriors worse than if they had been merely a 50 win team. And other teams will also be playing harder to beat a team that's making history.