LOL. You sound like Colts/Jetes fans from back in the day.
It is the other way around actually. Tampa's offense put up 14 points by the middle of the second quarter which allowed the defense to pin its ears back and come after Mahomes. When Brady led the final drive of the half to make it 21-6 that allowed the defense to play however it wanted as it knew KC would have to press. So what happens next? Mahomes opens the half with a beautiful drive but only gets the FG, still it is 21-9 and the game is well within reach. So what does Brady and the O do on their first possession of the second half? Goes right down the field and gets the TD to make it 28-9 and game over. It was one of the best complimentary football games you will ever see in a SB and would have made Bill blush like a school girl if his teams were ever good enough to pull that off against the very best team and very best QB in the game.
And if Tampa needed more than the 31 had the defense got lit up, the offense would have delivered. They stopped trying to score in the middle of the third quarter.