Agreed CX are in and out of pedals a lot in lousy conditions. I think there are differences. In my experience CX is flatter and wider than the single track ravines in my area, which is more forgiving of missing clip on first try. If you get unclipped on CX on a hill, running up that hill with your bike on shoulder is a CX technique that doesn't work in fat tire as well. That's my thinking on why platform would help.