D
I doubt he does at all....he WANTS to stay on 2 skis....whereas in riding like this video, he wants to ride on 1 ski.
Fact is, hanging a foot off is often the best practice on a steep sidehill when you need max leverage, and/or there are obstacles you need to navigate. Exhibit A:
If you have not encountered that, you are simply not taking lines as technical difficult as others. And that's fine....but chuckling at someone for good technique just shows you're not a hot **** as you'd like to think.
I agree if you weigh 110# wet you need all the leverage you can get. Paddling with your feet however provides zero leverage.
DPG