I think essentially we agree. That aggressive dogs should be on lead and muzzled in public places - mostly for their own safety.
I think that we also agree that aggressive dogs should not be allowed off lead in off lead dog parks. Off lead dog parks are fraught with peril because so many people who use them have no idea about what an aggressive dog is.
I've been trying to talk about a rude dog approaching a dog with joint problems - which I don't think you've understood. Old dogs and dogs in rehab still need their walks.
I do get mad at people who take their dogs with contagious diseases out eg kennel cough. But I get equally mad at sick people who catch public transport, or go to work or send sick kids to school.
A normal person and dog cannot tell the difference between a rude dog charging up, and an aggressive dog. And quite a few people have rude and aggressive dogs - who will pick fights with other dogs that stand up for themselves. I still think that people should not let their dogs charge up to on lead dogs without permission from that dog's owner. It can un do years of training or rehab. It's illegal, and I happen to think that particular law is a sensible one, and it's up to dog owners to make sure they know what the laws are. Same as drivers of potentially lethal cars should know what the road rules are.