All of that does not matter. It was brought in to aid goal-line situations. This was a field umpire's call no different to the missed in the back to Vandermeer.
It was not brought in to check the work of poor field umpiring.
Exactly. Nor are the cameras set up to pick up stuff 40m away from the goal. The ARC guy said there was a deviation, which was plain wrong. If the umpire didn’t notice the touch, I don’t see how they can use made up parameters but pretend they had something concrete there.