If you are concerned about "multiplying," then refusing to build housing does nothing to fix that. People living in cities with high incomes ans education and freedom to control their lives have fewer children than those who are poorer and live in less developed parts of the world. If you actually care about "multiplying" then you should be encouraging as many people as possible to move into urban areas for the greater economic, educational, and general awareness of the number of humans around them.

Secondly, if you are the least bit concerned about natural resources, you should also be encouraging more people to live in urban areas, where they consumer far less resources, far less fossil fuels, and generally have far less impact on nature.

Thirdly, that quote from a fictional character is just utter bullshit. Nobody is leaving Vancouver because they consumed all the resources, quite the opposite. People want to move there from other places, and not spread out. Opposition to projects like this forces people to spread out against their will.

The only thing opposition to this project does is increase environmental impact of people, reduce their happiness and access to the high value resources of the city, and most crucially of all to current power holders, put people out of sight while they consume more and are less happy for it.

So really, opposition to projects like this can only be viewed as an extreme form of greed. Adding in supposed concerns about nature, or multiplying, just points out that a person is just fine with both of things, as long as it's not insight. That is a fundamentally thoughtless, selfish, and asocial way to view the world, and it has caused immense harm over the last few decades.