The ridership of bike lanes…

The ridership of bike lanes is unimportant. Just as we don't build sidewalks because we need a certain "threshold" of pedestrians to walk on them. Streets like Bloor W were redesigned with safety as a priority. Lest we forget, a 69 year old pedestrian was killed by a car last year: https://www.cbc.ca/news/canada/toronto/etobicoke-hit-and-run-1.6812488
Bloor and Aberfoyle. Single lanes disallow speeding, weaving, dangerous passing, and racing.
https://www.youtube.com/watch?v=kqOxBZJ6c1g&t=136s (video about lane capacity by an American transportation engineer working in the Netherlands, where they consistently rank highest in driver experience/satisfaction by Waze data.) Lanes don't cause congestion in cities. Intersections do. And your own driving experience will certainly confirm this: All congestion/traffic/backup is caused by intersections unable to handle the volume of cars. Whether there are bike lanes at the intersection or not make little to no difference to how many cars can pass through that intersection per cycle.