Oh wow, Mimi, I am wearing those exact socks RIGHT NOW! except mine are with brown base color, not black.
Polyester and nylon socks do last longer than wool socks in terms of going "bald" at pressure points. Wool does lose some of its fuzz in places like toes and heels because of friction. I had some merino blend socks 2 years ago (not smartwool but another good brand) that went bald at the toes much too quickly for my liking. But so far I have had good luck with SW socks.
Xeney, part of the problem might be that you live in CA.No kidding!- it never gets so cold there that you need more than one pair of socks at a time usually, right? Much of the winter here I wear 2 pairs of wool socks every day, one of them usually fairly thick, too. And in Fall and Spring I might typically wear 2 pairs of thinner wool socks. I like to layer the colors sometimes and turn the outer cuff down. I think that keeps things cushier and keeps my toes and heels from grinding too hard at the socks.
One thing I have found that is funny is the different people wear through socks differently. A few years ago, a girlfriend and I bought the very same socks and wore them all the time. We also wore mostly the same clogs. Her socks went bald and wore holes in the toes quickly yet mine were still perfectly fine. Go figure!