How about a blend, best of both worlds? Sock yarn is 75% wool and 25% nylon (polymide), is insulating, strong, and doesn’t look like hot shit. Socks knit with this withstand years of abuse on your feet, and you can just throw it in the washing machine on a wool cycle with a bunch of other socks. They keep you cool in the summer and warm in winter. People used to knit socks entirely with wool, but the nylon means you don’t end up with a bunch of friction holes to repair.
Socks typically use superwash wool. The army invented superwash wool because wool is best for socks in hot, sweaty conditions for hours and hours, but not being able to wash the socks with everything else causes lots of waste of materials.
Superwash chemically treats the fibers to remove or smooth the scales that lift up with exposure to heat and then friction makes them stick like velco to each other, which is the science of how felting happens. Superwash has the downside of stretching more when being worn, which makes it a bad choice for sweaters because the sweater will either grow or shrink back during the day, causing fit issues. The wool retains it's ability to bounce back on the next wash, but if you want to block something and be sure it will retain its size between washing you don't use superwash. You also can't as easily steek superwash yarns, because steeking relies on the velcro properties of wool to keep the thing from unraveling after cutting it.
Basically all fibers have their proper uses, cotton is fantastic for dishcloths, but it doesn't bounce back so it's a terrible choice for garments. Acrylic lasts for decades, but it's often quite scratchy. Mohair is fuzzy, but is impossible to frog. Alpaca felts easier than wool, but is less scratchy and warmer, the felting makes it awful for garments, but the softness makes it a better choice for chemo hats. I could go on, but I won't, my point is not knowing any of the above makes it harder to substitute yarns in patterns, which is why so many people struggle with that. It's like making a recipe for cheesecake and using cheezits for the crust because you're out of Graham crackers. It'll work, but you'll probably be unhappy with the results.
FYI, the kitchener stitch is also the invention of a military organization. Seams in socks in ww1 contributed to the foot conditions that the soldiers dealt with. So general kitchener from Canada asked some of the women who were knitting said socks to come up with a solution, and some genius, unnamed, woman created grafting. The general, of course, took credit for it, thus the name. apparently he was a real asshole, thus the cancelation of said name among the dangerhair crowd.