There is no perfect answer is there? There are times when your wrists can use that support like when you have to really jam hard plants on ice and steeps.
I see at as a simple matter of conditioning and haven't had a ski injury to my thumbs in over thirty years, probably because I don't extend my hands (fingers),in a fall .... it is a natural reaction to open your hands (like in judo); skiing, I keep the hands closed.
Oddly enough, there were more hand/thumb injuries when in the late 70's they came out with strapless "race like" grips because they found people extended the fingers even more.
When I was fighting one of my instructors once, a wiley old guy who was known for sudden bursts of speed, I figured I get him "Okanawan" style with a grab to his gi, so I left my hands open. His first move was to take out my left thumb and his second shot was to my right thumb. Now sporting two severely "jammed" thumbs and in great pain .... I asked him what the f' he was doing? His answer was simple; "I'm teaching you not to fight like that."
In the trees, back country and such, do as the natives do but on the trails .... if you want to hike after each fall go at it.
VA ..... slalom cones on a pair of old poles wouldn't snag on the brush as easily a conventional baskets. You can rough the shaft with coarse grit paper and use a marine epoxy and they stay on pretty well