Necessary? Not really. Fun, quick knit? Yes. A perfect, portable car knitting project. Plus, I had this beautiful skein of Lynai Yarns super wash merino that I purchase last spring in an insta-sale. Since I don't dye any super wash worsted weight yarns myself, it was a perfect opportunity to use the yarn.
I've finished one sock and am speeding through the second. I'll have to get back to you on the functionality - I think it will be nice when I practice at home, because it can be chilly here, but I'm not used to practicing any other way but barefoot.