There is nothing confusing about it. There is a reason even D3 college refs can manage this. There is a reason refs can manage this without actually needing you to come up to them. This allegation here is that maybe 70s arms were 5 degrees too close to him while jogging from 30 yards away and that act somehow made the ref get confused and make him unable hear or see the guy 2 feet away from him saying that he is declaring.
I honestly believe anyone who believes the NFL here, after already being shown to be liars on their first excuse, should probably be barred from financial autonomy because they are going to get conned at some point because we are seeing that they are gullible enough to believe the most obvious lie being told. In an attempt to cover up gross incompetence they could not even tell a good lie which seems rather fitting. The fact that they tried to sell people that it was not the guy 2 feet away from the ref actively declaring himself eligible but the 70 who is 20-25 yards away checking into the game and not near the ref at the time is an awful attempt at a lie. You could have at least said it was the guy next to him but I suspect the NFL was worried about any audio picking up that lie. The only thing more concerning to me that they tried such an awful lie is that there are seemingly people who are believing it and trying to sell it for them. The NFLs excuse is insulting and there is a reason every single coach and player who has commented on this is trashing the NFL for it.
The true kicker though is this ref crew is known to be incompetent. For those who do not remember they are the crew from Packers vs Chiefs who on the final drive in the span of 5 plays called a 15 yard penalty against the Packers for hitting Mahomes out of bounds when he was still in bounds, then stopped the clock when the receiver was going backwards (it should have kept winding which would have changed the drive a lot), then did not call a very blatant PI and all of that on the last drive of the game. So in the span 5 plays they made 3 game altering mistakes and now I am supposed to believe that the Lions, who took it a step beyond when it comes to reporting as eligible by actually going up to the ref and they even informed the ref of the play before the game so that he would not mess it up, are responsible for the mistake and not the ref whose crew has a history this season of critical mistakes in big moments. Occam's Razor strikes true here.