Reason number one I don’t partake in the skiing activity.
When I was a not-so-wee lad, we lived pretty close to some world class skiing. Hence a lot of the kids were on the slopes a lot. I noted that a good portion of those kids spent part of their school year in some unflattering footwear, with a scientifically designed tree branch under one or more armpits. Using my Holmesian powers of deduction I figured out it was a dangerous activity, and politely declined when I was invited to such activities.
Besides, they all had more money than me and were typically a bunch of assholes.