One should never use pole straps while skiing in the trees because of tree roots and debris under the snow it's easy to get a pole basket caught and with the momentum and force of skiing you can easily rip your arm out or some other injury to your shoulder, arm and or wrist.”
Do you need ski pole straps?
Ski pole strap
The strap is important because it allows you to create tension between your wrist and the pole when holding the handle and can minimise your risk of injury when you fall.
Do professional skiers use poles?
If you ever put on a skiing competition on TV you will see that professionals from all events have poles. ... A possible side effect of using poles is that you can become too reliant on them. That's why it's good to sometimes leave them at home and go back to basics.