I think it probably doesn't look that bad because frankly everything looks kind of comical when you're in a mascot suit. But being grabbed and driven to the ground like that hurts when it happens on grass. Then imagine it on ice.
The Kings have a mascot (who I find mostly annoying but am apparently in the minority) who often does the same thing during contests. He'll mess around making it slightly harder for one person or help someone else. But the contest is always for something fairly small. It's not like they're about to win a car.
When you agree to run around on ice and try to sit on an inflatable chair between periods of a hockey game, you really shouldn't expect it to be officiated like an olympic event. Especially when one of the officials is wearing a giant Marmot suit.