The biggest flaw being that the rest of the game would have panned out differently following the debatable decision
Yes, but you could argue its validity if the team whose goal wasn't given was completely on top before the event and then for the remainder of the game. If it was even handed or that team was under the cosh then perhaps not.
Chortle! So Man Utd, Man City, Chelsea and Arsenal have all had more crucial decisions for and against them? What a crock of poo.