The problem is that our governments are shit planners. They've allocated funds poorly, failed to train enough healthcare workers, failed to expand transit, financialized housing, and basically just paid attention to the next election cycle.

The article kinda mentions that, but doesn't go into it. Recently, politicians used immigration as a stopgap to cover for our terrible productivity and aging demographics (don't forget post secondary funding!).

Do you trust the current crop of politicians to suddenly find competence and be able to pull off a smooth doubling of our population when they screwed up the 30% increase of the past free decades?

I don't.