Winter Park Bob's drill is about keeping skis parallel ('parallel to the max') as he claims it's important for mogul skiing. And it doesn't help to have our skis pointing in different directions. Not sure the context for when/whom he'd feel the need for such a drill. Can't say the thought "going into the bumps, must drill some 360s" has ever sprung to mind.
Guess it highlights the importance of understanding the context of instruction. That can be a bit difficult in a 2 hour lesson and damn hard from a 90 second vid.
Whilst I didn't love that vid, in order to do a good 360, you have to be able to release your edges simultaneously, I teach people with sequential turn entries to do 360s all the time.