You only have to look at the bus plans that the TTC has been posting for the longest time to notice this. With the launch of the Finch West and Eglinton Lines, all bus services were to be removed from the surface section of those routes, replaced entirely by the streetcars. Had the stops been every ~1km apart like you see on Viva, they absolutely would've kept at least some local bus running, similar to what YRT does. The only reason they seemed to have backtracked on this idea is due to the backlash they got with the Eglinton RapidTO project, where cutting a handful of small stops was enough to get people angry, and they want to avoid that with Eglinton.
I also think there's a quote of some TTC official that said as much about LRTs meaning to replace busses, but I can't seem to find it. But as it is said, actions speak louder than words.
You're comparing modern LFLRVs with PCCs? PCCs are extremely small vehicles that are built extremely similarly to busses, and guess what, nobody is manufacturing anything remotely like them anymore. Modern LFLRVs are a completely different beast. As for When I refer to LRVs having longer idle times, I should specify that it is circumstantial, but those circumstances are far more valid during off peak times. If you have a lineup of people trying to get onto a bus, then yes the bus will have the longer idle time, but when you have 2-5 people getting on, the typically opens door significantly faster than LRVs. Just compare the TTC busses opening and closing doors with the Flexity Outlooks where the doors are typically slower and occasionally you even have to sit through a jingle. And no, this isn't a Toronto thing. The same thing happens in Amsterdam in other European cities.
LRTs have a time and place, and that time and place is dense urban cores where you need to move a lot of people short distances. Despite all of the problems with the Spadina Streetcar, that line is the perfect example of LRT being implemented in the right place and environment. Hurontario is not it, Eglinton is not it.