I don't know why you're taking this conversation seriously and literally, all that is being argued is that repurposing Union Station sometime in the future as the region grows isn't an unreasonable idea, and could be looked into as a potential future project. If the population doesn't grow, then we don't build it. It's that simple.
I mean if we're going to daydream about to how spend a billion dollars, I wish that was directed at something that actually makes a difference for most residents.
I have a dream. That some day, regardless of which city or neighbourhood people live in, they can get a bus in less than 15 mins.