Also you've clearly never interacted with cattle, sheep, goats, llamas or alpacas, which absolutely do get things like veterinary care and vaccinations. Large animal vet is a whole specialty and they spend lots of time working on animals other than horses. No trips to the vet???
Farmers absolutely have a vet who takes care of the cattle. I am not sure what you are on about.
The whole point of cattle-vs-pets is you are supposed to treat all the servers the same, not that you have to treat all of them poorly.