OK, you're backing off your original stance a bit.
But I still disagree on your points.
In the skier example, the backcountry is not negligent. This is different from the question of whether a negligent driver can blame a cyclist for the cyclist's injuries.
I also think the "it's costing us all so much money" argument is a bit of a strawman. In places without socialized medicine (e.g. the US), your tax money isn't funding my injury treatment. And in places with socialized medicine, perfectly legal activities such as smoking and drinking and not exercising incur costs to the system, I'll wager, several orders of magnitude greater that sports-related injuries.
But I still disagree on your points.
In the skier example, the backcountry is not negligent. This is different from the question of whether a negligent driver can blame a cyclist for the cyclist's injuries.
I also think the "it's costing us all so much money" argument is a bit of a strawman. In places without socialized medicine (e.g. the US), your tax money isn't funding my injury treatment. And in places with socialized medicine, perfectly legal activities such as smoking and drinking and not exercising incur costs to the system, I'll wager, several orders of magnitude greater that sports-related injuries.