If they wanted the Laporte situation to be called handball they could have easily and clearly worded it that way in the guidelines, like they have when scoring a goal direct by your hand/arm ie it doesn't matter if accidental or not. But they didn't, they must have done this for a reason. They took the word accidental out and replaced it with a much more detailed description "player gains control/possession after it touches their hand/arm and THEN creates a goal scoring opportunity," making a it a completely different way of looking at it.
You can't get a more clear indication of the different guidelines for each situation. They are completely different when they don't have to be.
They could have simply said "you can't score direct off your arm/hand OR create a goal scoring opportunity with your arm/hand whether accidental or not" if that was their goal.