It's pointless arguing with Riverman; he is, to his car, the boomer equivalent of a 14 year old girl who lives on Tiktok.
But in case anyone actually believes what he's saying...
95% of Winnipeggers do not drive. Small children do not drive cars, even in Winnipeg. 95% isn't even an accurate representation of mode-share in Winnipeg in general, and especially not in the neighbourhood in question. I'd be surprised if even a large minority of trips in Osborne Village were in cars. Like Viking said, this is a change for the benefit of people driving through the neighbourhood, not for the people who live there.
If anyone cared about making the intersection safer, maybe they'd get rid of the things that make it dangerous: cars.
Many cities larger than Winnipeg don't have freeways. This one is easily falsifiable; just look on google maps. Even if this was true, nobody who makes this argument has ever explained how freeways in the suburbs are supposed to fix traffic in the city. Nobody is driving out of their way to use River ave, just like nobody would drive out of their way to use an improved Bishop Grandin.
Winnipeg wasn't built as a "car city". It was built around streetcars. It's rotted since the city ripped them out to try to become a car city. If it could change before, it could change again. Being one thing doesn't mean it's right to be that thing. Winnipeg is a place people leave (ironically, including Riverman himself) for myriad reasons; that it's been hijacked and run into the ground by suburban drivers is a big one.
As a corollary to the last point, making the city centre harder to drive around in wouldn't drive people away. It would make the city more liveable, which would invite people to stay. The status quo drives many of us to other cities entirely--cities where it's harder to drive around in the city centre.
Finally, if you're repeating the process indefinitely, as the idiom implies, the order in which you rinse or lather doesn't matter. I don't know how good a lather you'll get in dry hair, but it'll work itself out on the second iteration.