just because a dog looks menacing to you, doesn't mean it should be kept of a lead. If it's under control and behaves appropriately, you don't have a leg to stand on I'm afraid
I agree, people can't be forced to put them on leads. Yet. But wouldn't it be considerate and kind to do so in public? Many people are afraid of big dogs, especially children. Many others are wary. I think dog owners need to consider other people's feelings before letting the dog off-lead. The dog can still get exercise on a lead. The lead provides a sense of security for people who don't know your dog.
Maybe the answer is a law requiring dogs and owners to pass tests before being given permission to let them off lead. Eg an 'off lead certificate' that proves dog has good recall, gentle temperament, no behaviour issues etc. And heavy fines for owners who break it.
As for huskies, I can't imagine how they make suitable pets. I've encountered them in the Arctic, where they're used to pull sleds and gaurd against polar bears. In the Inuit villages, if a husky bites a person it is instantly shot in front of the other dogs. If they can't determine which dog bit (eg all were chained together) they shoot the whole team. The dogs roam freely around the villages when not working, they can't run the risk of a biter or of the aggression being bred down.
I do think many people get overly sentimental about dogs and their rights in the UK. If you want to keep the freedom of exercising off-lead, you need to make people feel safe, otherwise people will keep campaigning for a blanket ban on unleashed dogs.