There are around people killed by cattle each year so that i# far more than by dogs for instance, a lot more are seriously injured. Most are farmers, their families or workers, there are 1 or 2 walkers killed each year, plus a lot of near misses, almost all had dogs with them. If you must walk the dog keep away from cows, if you do find yourself threatened by cows LET THE DOG GO and save yourself. The cows will chase the dog who is a lot more agile than you and will almost always escape.
Dehorning, almost all commercial cattle are either dehorned or naturally polled, when they are housed in winter it makes them much easier to manage and saves injury, to each other and workers. The exception would be Rare Breeds, Highland, Longhorn and a few others, also some herds that live outdoors year round. If all cattle were polled it would be great but that’s not possible and safety and welfare must come first.