You forget the 1st and goal from the 2 yard line that the refs stole from the Hawks on the BS holding call.
I think Ben was short on the TD because his forearm was barely touching the goaline and the ball was behind his forearm, His forearm would have to be thin as paper for the ball to have been over the line. That indisputable evidence rule is just a way the NFL allows the refs to not overrule bad cause that will lead to an outcome undesirable to the NFL.