Intent is really more important than the act itself, when you hack someone down from behind you're stopping the goal scoring chance, but as I was pointing out during el classico, best players in the world don't simply finish every brilliant chance they get, they miss more than they score. It's not stopping a goal literally, just the intent of the tackle is to prevent them trying to score.
There is a handball where it bounces up and hits your arm, where you control a long ball and it's off arm rather than chest, and there is diving towards the ball with your hand outstretched infront of your goal when someone has taken a shot. The difference is clear as hell.
Meh, it's all a bit silly, and there is probably some level of making it up to Arsenal for the mistake influencing the decision. Doesn't much matter, at the moment AOC is playing extremely poorly and probably needs a rest, or dropping, to encourage him to do better. Same for Gibbs, like Wenger most of the squad shows incredibly little progression, Gibbs has been making these positional mistakes for 4 years with no improvement, no sign of him using his brain, learning from mistakes and not over committing forward so often.
Even in a game like against Chelsea where they have devastating pace down the wings Gibbs showed absolutely no intention to play it slightly safer. He was bombing forwards before there was a clear sign the ball would make it forwards, he ran beyond the play while the ball was still basically at the half way line and left us utterly exposed. After the first goal with Gibbs completely MIA, did he say "opps, I guess I should stay back in this game and actually defend", nope, he kept doing it and that led to goal 2, then the penalty.
This is what frustrates me so much, Wenger is too damn stupid to tell Gibbs to stay back in a game like this despite knowing precisely where the threat comes from with Chelsea. Gibbs himself is too stupid and crap defensively to do this naturally without being told, and Arsenal never adjust tactics even though the opposition will. We actually make it easier than any other team because our weaknesses are plain to see for everyone, and every decent manager out there simply sets up their team to exploit them... and unlike everyone else, we will predictably play that same way that the opposition have set up to beat.
Mourinho thinks, Arsenal have absent fullbacks, no striker, lets bomb down the wings, hit diagonal balls behind the defence to left/right back area's and just stream forwards.... Wenger could adapt tactics to make this hard/impossible in the game but instead plays same as always.
Wenger's utter predictability, and lack of any kind of per game tactics, makes Arsenal maybe the easiest top 6 team in any league to play against. Because every other top team can prepare precisely for the type of Arsenal team that will show up to the game, they will know exactly how to beat them, and the tactics don't change year to year so beat them once, it will just be easier next time.
LIkewise find a way to prevent Arsenal winning, Wenger won't adjust his tactics, so it will almost certainly work again the next time you play them.