All the roads in downtown and the inner core and surrounding areas predated, were not planned nor designed for cars at all.
And none of the roads in pre-WWII Toronto were designed as unfettered free ways for motor vehicles.
There are roads that were built post WWII that can accommodate single occupancy vehicles to your hearts delight and there are roads that can't.
But, you "want to throw common sense out the window" and drift into this fantasy land of an expansive, endless, paved tar landscape that does not exist.
So you're going back almost a century to base your analysis? Ok.
Do you think they eventually built roads with multiple lanes because the whole car thing was not catching on?
Do you think the number of cars is been declining since?
Why do Marxists want to tell everyone else how to live?
If I want to drive alone in my car that I purchased with the money I've worked for and paid taxes on, on a road that my taxes have paid for, then that's my choice.
If you want to ride a bike in a snowstorm then vote for someone who will build new lanes specifically for bikes without affecting existing car lanes.