Well, no one is moving their houses at the base of Mount Jumbo just because a once-every-100-years human triggered slide came down.
Installing a lift line involves all kinds of stuff from purchasing and installing the equipment, planning route, yeah, probably have to do an environmental impact study, and the ground where each of the towers is going to go has to be sampled and studied to make sure it can support what's going in. It would take years to put something in a different place. Once also has to assume that there is a strong likelihood that it was put in a very optimal place, and just moving it somewhere else is not an easy answer traffic flow wise.
And of course they would do the same thing over again. Are they supposed to just wait till it happens with dozens of skiers on it?
Ditto on the "dangerous" terrain thing. Looks like a sweet bowl. That's probably why it broke so huge. Optimal conditions and such. A bunch of rocky crags wouldn't be able to develop nearly as big a slab.
