so I think indeed even a vegan can see why wool would be OK to use
Most don't. And I can understand
to a point. Living on a sheep ranch I see what happens. Sick sheep don't get to see a vet. They get "given a chance" and I am quoting. This translates to a vet is too expensive, so we'll leave it to see if it survives and not worry if it dies in the night (and yes, I've seen the outcome with sheep having their eyes pecked out by crows, magpies and ravens before they are dead. We quietly intervene now and say nothing).
But some I know don't seem to appreciate the balance between the environment and veganism. And that is why I've left several vegan groups and forums. There are those out there who advocate that the moment you turn vegan you should throw out, (aka destroy) anything woollen, containing wool, leather, suede, containing duck feathers or feathers in general, bees wax furniture, cosmetics, and so on. They
won't donate it because someone else can continue to benefit from the death of that animal/insect/fish. My view is that I need to strike a balance between veganism and environmentalism and care of the planet. Destroying something that
others could use is just wrong in my view and something only a vegan in a first world country without any regard for others would do. For me, continuing to use something such as a woollen jumper until it wears out is completely fine. Plus I'd rather use what's biodegradable in a sensible time scale have why I have no issues knitting with wool but I do source it and ensure it comes from countries with a good animal welfare background.
A lot of sheep are dual purpose, such as those on the farm I live on. Despite being merino sheep/lambs, they are grown for their meat, not their wool. Their wool is sheared twice a year so that they put extra weight on by eating more because they are cold. Their wool is low quality and way too short to be used in the woollen industry. You need a long staple with a measure diameter less than 20micron to get anything like a reasonable price. 16 micron is preferred by those who knit by hand. You also need to keep such sheep indoors in barns or with coats over their fleece to prevent ingress of dust, dirt and more importantly vegetable matter as it is known, if you want even a vaguely break even price for the fleece. Plus there is a lot of issues over mulesing and docking of tails. (Mulesing is the removal of strips of wool-bearing skin from around the breech of a sheep to prevent the parasitic infection flystrike. It's legal in most countries sadly. It's not done with anaesthetic and often not by a vet. I don't agree with it, there are other ways of dealing with flystrike.)
Best not to get me started on the vegans who will happily rescue a pure breed dog or cat from a shelter (thus indirectly supporting the breeders) and in the same breath have a go at me for (only) eating the eggs of the chooks I've rescued. Apparently it's fine to rescue cats and dogs, but not chickens. Go figure. I've been told repeatedly by some that I should smash the eggs they lay and let them eat them.
. Most of the eggs my chooks lay go to the food bank and get distributed to those in need. I'm repeatedly told I'm wrong and supporting the egg industry because I rescue chickens (I've stopped rescuing roosters, it was causing too many issues). Hence why I'm only a dietary vegan at best. (I'm not happy with the use of leather and suede though for obvious reasons.)