The other way to get out of control in the moguls is to overcorrect forward and "taco" over the front. You can chip a tooth that way, on your knee. I just happen to know that. ;) Usually there is a loss of fore aft balance to the rear to correct from first. What the kids in the mogul comps do is really different from what many very accomplished formerly competitive, or just expert, mogul skiers do in real moguls that have not been dug in with a shovel. And the line skied is often different. Rather than in the rut, over the tops, opposite of the ruts, banking on the sides, etc. The move forward down the run needs to be an extension square to the slope of the hill and as @andjules points out, is hard to do, especially if you are going over the back side of a bump which can make it even steeper than the overall slope of the hill. one needs to train both extension moves, from the knees with limited opening of the ankles keeping a good grip in the boots, and/or a retraction move bring the feet back in relation to the body. For me, usually a blend but not always.
WRT the athlete in question here, or any waterskier, the skier on a waterski still controls relationship of the body and center of mass to the base of support (where to stand on ski) but also has to resist the boat. And of course that is different from leaning back fore/relative to aft on the ski. So yeah, different.
I don't know if Bode waterskis, but I bet he could figure it out pretty fast. I used to pull Paul Mahre (Phil and Steve's little brother and also a World Cup contender before severe hip injury) behind our old outboard boat back in the day. He could pull that thing to a near stop. He had not learned about being lighter on the line. But really not many of us had at that point, except maybe Andy. :)