Feels like a bit of a disingenuous article when it won't openly talk about the downsides of density. The downtown core of Toronto got denser and it got completely soulless. It's tower after tower that block daylight from reaching street level, leaving no sunlight but for those living at the top, and endless stretches of shoebox apartments where you're lucky if you get a balcony. There's no independent shops left and all the real estate is owned by massive corporations and banks that are always trying to extract as much money as possible from their tenants.
Their solution of bowling over all single family housing to replace with midrise apartments is also not exactly going to be popular.
I get that we need to density and we need land reform but your proposal is going to have a real hard time gaining traction if it boils down to "let's tear down everything here that all the existing residents chose and replace it with something else that we think is more logical".