It's mostly illegal to sell it. I think just for processing/cooking (cheesemaking) is it legally sold for. But idiots have no qualms about breaking the law by lying.
They’re are essentially trying to catch the disease and spread it via misunderstood science. Their stupidity puts us all at risk. It’s the same reason as any other law - stupidity and ignorance is not an excuse to fuck over the rest of us.
It's happened a handful of times around the world, passing from livestock to human. It hasn't yet ever passed from human to human, fortunately, but contact with infected livestock (or, potentially, drinking infected milk) is how a virus might evolve to better infect humans.
If only this would remain within the idiot population. The increased risk of them getting infected and allowing the virus to mutate in a way that makes it more virulent/transmissible in humans is bad for everyone.
It may be but we will all pay the price. It's jumped from Avians to Mammals (cows) it probably has jumped to cats, and in one case may have jumped to humans already.