It's not just a TTC thing, it's a North America thing. It's because we have a culture that a) prioritizes the illusion of safety above all else, and b) is so litigious that the only solution to anything is to restrict restrict restrict.
New York added a lot of timers on their subway in the 1990s that slowed trips down considerably, out of an abudance of caution after the Williamsburg Bridge accident.
The MTA is studying a simple idea to reduce the plague of subway delays: Run the trains faster.
www.ny1.com
Metrolinx is also like this. The speed limit around Renforth station is
20 km/h, and they're so fanatical about it they demanded that the TTC ban all buses without geofencing abilities so that they could strictly follow that speed. And if anyone on here actually used the transitway, they'd know that the part of it that is owned by MiWay is no speed demon either, despite being entirely grade separated and exactly the sort of transit solution that the anti-LRT types love to hype up. And it's going to be real fun when the new MCIs for GO enter service, too, as Transport Canada rules since September 2020 prohibit standees on buses with seatbelts.
Anyone who is going after LRT as being the problem is barking up the wrong tree entirely. Look around you, the problem is the safety culture that we have created.