Well what you are saying isn’t true. There’s plenty of new people walking on the sidewalks of confederation between burnamthorpe and rathburn. Same with living arts drive between the same two streets. That’s two more or less streets that are vibrant and I don’t think you can honestly label living arts drive as a strode.
We have vastly different benchmarks of what constitutes vibrant. And yes, I've been to lots of small towns with more lively engaging sidewalks than Mississauga. Most of them were in Europe but some here in Canada.
I'm not sure what a lively engaging sidewalk is. There are places in Canada with obnoxious inquisitive neighbours without much population density and in both walkable and drivable environments. You can pass a 1000 people in the GTA without having to saying hello. You can't pass by 5 people in some Canadian towns without having to give your entire day's itinerary