Breaking through is not the same as being usable. Reports of delays and sub par work in 2019 are well known. I stand by my point. Every tunnel project has been problematic, faced delays and additional expenses.Untrue, the Valley Line tunnel broke through on schedule. It was the concrete lining that had issues (if CBC's reporting is accurate), and the project had issues with concrete in general. Not tunnels.
Edmonton's downtown LRT tunnel is well built and functional (it needs repairs, but it is also almost forty years old). The city has suitable ground conditions for digging and has a long history of tunnelling, from the first coal mine tunnels that were dug in its formative years.
I know you want something to be true, but that doesn't make it so.