That said I do agree we are at an advantage, I just don't feel it's fair to assume dogs that don't break leash laws are somehow mistreated.
I'm in an urban area, though. Although we have a lot of green space and a great parks system in my city, it is still densely populated and on-leash park areas (which is basically everywhere that's not designated as an off-leash area) are multi-use and well-used. On a busy weekend especially there will be all sorts of people doing all sorts of things with and without pets, and there is always traffic near enough that it could be an issue. It's just really not an appropriate place for off leash dogs. Same thing with dogs being walked off leash through the neighborhood - too much traffic and too many other people and dogs walking. So that's the perspective I'm coming from.
Out in the middle of BF nowhere, or sparsely populated areas, or lightly-used parks with tons of open, unused space I would probably be a little less anal about it. But that's not how things are here.