Why? The whole philosophy of Transit City was to prioritize local accessibility and community building over improving capacity, speed and mobility. It was motivated more by urban design theories rather than meeting real transportation needs. My evidence for this is that Transit City was never supported by any serious travel demand survey and regional travel model. One fine day in 2006 I just opened the papers and here was this jolly good plan to build $8 billion worth of light rail on somewhat arbitrary roads (surely some other line would take precedence over a Scarborough-Malvern LRT, but I digress...).
This philosophy was supported in practice by placing the stops at the closest intervals of any light rail system proposed for a suburban environment. To me, the stop spacing was the primary reason to oppose Transit City. I have no qualms with the mode nor even with most of the routings, even if they were not empirically supported by any evidence of [transport] need.