Skiing is a dangerous sport. Anyone who participates in dangerous sports should be aware of the danger and accept the fact that injuries can, and probably will, happen. To blame another person for those injuries, except in cases of deliberate and extremely stupid behavior on the part of the other person, is the sign of a wimp or just a plain old jerk(stronger words come to mind but will not use them). Guy doesn't want to get hurt skiing shouldn't ski.
You realize this lawsuit isn't about the risk, its about the fact that this 60 year old dirt ball finds himself with possible way to take someone else's money, and he's going to exploit it. Nothing more.
You can talk about assumed risk and frivolous lawsuits all day, he (and his lawyer) aren't going to care. At the end of the day, they're looking to get paid. No different than your typical professional welfare dirtball.