I agree that skiing is skiing, but....
A huge part of skiing is style, perception, and individuality. Expressing yourself in all aspects, to me, is really important. I agree that your skiing should speak for itself, and that your individuality shouldn't represent the clothes you wear, but who are we kidding? What you wear has a huge impact on your style, straight up. A trick done in 3XL clothing is going to look different than a trick done in tight pants and a sweater-vest. The size of your clothing really DOES MATTER and correlates DIRECTLY to your style. It affects almost everything you do, because our bodies definitely react to the feel of clothing when we ski. Think about it, everything from hand/arm motions, to grabs, to how we spin. If we have tighter clothing things might be a little more forced. If we have baggy shit, style might be a little more natural. Then again there are exceptions. In a perfect world it wouldn't matter at all, but in this world, in this time, it does.