They are to me. I don't buy them a lot, but I currently have about 5 pairs that were pretty expensive. They are a splurge but I love them which to me, makes them worth it. I don't really think there is a right or wrong answer to this. The quality isn't any better than the $100 pairs but I don't regret buying them.
I have the Chanel 5120, 2 pairs of the Dior large glossy in white and in black, Juicy, Louis Vuitton from waaay back when.