That's a rather large-city-dweller-centric view of what people use their cars for. Public transport certainly can and should be part of the solution, but it's often impractical in lower-density areas.
Let's see here, the last few times I took a car out of town . . . Well, we could have gotten the six boxes of books shipped, I suppose, but it would have cost more than just going and fetching them from 120km away. Family funeral on short notice—no option other than doing the ~400km-each-way drive. Medical emergency (mine)—400km-each-way drive again, since it wasn't a life-threatening condition that would have caused them to find an ambulance right away, just something that could have blinded me in one eye. None of those things were recreational, and most of them weren't really optional, either.
Some trips out of town are important, and you don't always have the luxury of waiting for public long-distance transit that runs only a couple of times a week, or enough notice to prepare your vehicle in advance. We need private vehicles, and the infrastructure to keep them on the road. EVs may not be the future in Toronto so much, but Toronto is only one small part of the country.