Not the cat's. It's your fault because you haven't done your job as a parent. Removing dangers in your home won't teach Junior anything about the dangers in the big world. You have to let Junior learn that a cat is a living, breathing entity, and that Meowser can feel pain, too. And when Meowser can defend himself, Junior will learn.
Nice furniture is nice.
But it isn't that important to me. My cats will hopefully live long and happy lives. Which can be twenty years and longer. I don't expect my furniture to last that long, heck, our sofa is in worse condition from us sitting on it than from the cats' claws. But, I guess material stuff isn't all that important to me.