If DeVonta Smith’s helmet stays on?

it absolutely matters. Review would not stand because forward progress would be called upon review. This has happened before, it will happen again.
OK~! I'll buy that argument as being worthy maybe but NOT valid, as the player's feet were still moving and he was fighting to gain ground.........Anyway, I do suppose you are correct and that must be what they called even though no one described it on the broadcast, really.........