the rule on the books that season and it was heavily enforced: skate of any attacking player in crease and no goal!
The rule also stated that if the puck was already in the crease, attacking players could follow the puck into the crease legally, and goals scored in such a manner would stand. You can't just say "skate in the crease" and then say "no goal" and have a cogent argument.
There was a goal scored in the exact same manner as the Hull goal in January of that same season. I want to say it was a Blues/Coyotes game - I'm sure the game was played in Phoenix - and I'm pretty sure it was Keith Tkachuk (don't quote me on this; it was ten years ago!). But his skate was clearly in the crease (as Hull was), but he had clearly followed the puck into the crease (as Hull did), so it was clearly a goal (as Hull's was).
People like to jump and scream about this rule because of all the goals that were called back because of toenails in the crease, but the Hull goal and the Tkachuk (?) goal are the only instances that I can think of where the issue of "following the puck into the crease" was relevant. And since the Tkachuk case was much more low-key than a triple-overtime Stanley Cup deciding goal, obviously it wasn't as well remembered in hockey's collective psyche, which is why people like to think it was a "new rule" implemented to "cover up" the "blown call".
But due to the celebration already in progress they don't even think twice about going upstairs
That's about the goofiest line of thinking that I've ever heard .. "They're celebrating like it was a good goal, so it must have been legit. Let's not be party-poopers by doing our job and reviewing the play!" I agree that the play should have been reviewed, but the video evidence would have upheld the call made by the official, and there's
no chance in hell that they decided not to do that because the players were already celebrating.