“We need tons of parking lots until we get walkable cities” gets things totally backwards. Walkable cities are impossible because of the stupid amount of parking lots we have.
The dilemma you pose of “parking vs walkable cities” isn’t even real: we massively overbuild parking lots so we can stand to get rid of most of them. I’ve been to SK many times. Strip mall parking lots are half empty even during the busiest times of day. It’s insane. You could build housing on tons of that land without ever causing parking lots to fill up.
Here in Vancouver, there are almost no strip mall parking lots and the absolute number of cars is higher than anywhere in SK, and yet, there’s STILL too much parking. There’s almost always parking within a block or two of any store outside of the downtown core. The distance you walk probably isn’t that different from across those huge parking lots.
Honestly, we can go on a massive parking diet and, because we overbuild parking so much, there won’t even be any downside for drivers.