Most of northern Ontario, and really most of rural Canada could not live without a car. You'd be surprised how many towns don't have Uber, and the only cab is two dudes who might come get you when they feel like it. I've known people who moved up there who have epilepsy because they say the cops don't bother pulling anyone over so they can drive without a license.
I know. I'm from rural Canada. I didn't say everyone could live without a car, I said "most." It's not feasible for everyone, especially given current infrastructure.
But most people live in urban areas where it's very possible to get by without a car.
780,000 residents in northern Ontario still need to get around though. Transit would also have to become much more robust in cities for people to unload their car.
More importantly, it’s quite possible and we have living examples, to intentionally design cities this way and give people more freedom and convenience