[Joakal]

Even if you're 100% confident in off leash, one time they run across a road for treat / squirrel/ family / friend, its game over.

We believe in off leash too but dogs don't understand dangers like we do. I wish we could have a conversation with them.

[kevincox]

Even if you are right to be 100% confident others may have phobia of dogs (possibly due to traumatic events in their past) or simply can't tell at a glance how well trained your dog is so you should still use a leash in close proximity to others.