for example, maybe not from ice, but my Wife & several BF members recently had falls breaking wrists. so that's 6-8 weeks with a cast for a simple fracture, more if you get screws installed. then there's recovery after the cast is removed. not like new. weird shooting pains, weakness & other assorted discomforts. maybe a rider is good at falling, maybe he/she isn't so good at falling. reminds me, I took a ride last year, hit some ice with my gravel bike, almost fell. so I rode back home to get my studded bike. we get lingering ice on shaded trails when the rest of the town is dry & clear