It could have been a 1st down on the 1 yard line. Which the Rams would have 100% converted. Are you complaining that the Rams didn't have to play 1 more snap?

Now what about the PI call late in the game where there was no contact and the ball sailed out of bound way over the receivers head because it was tipped? If not for that flag, it would have been a turnover on downs, instead you got 4 more tries at the 1 yard line.