I think the point is that by all means build more supply, but don't expect that that alone will solve all your problems. There are real physical limits on the

I think the point is that by all means build more supply, but don't expect that that alone will solve all your problems. There are real physical limits on the ability to create supply. Even after cutting red tape, developments need to be reviewed, and there are limits to the pace of reviewing and limits to the amount of trades available to build the approved buildings. As the article states construction takes time. In a high demand environment, for example in a speculative housing bubble, demand could dominate the ability of a city to create new supply. In this case you can add more supply, but it won't halt price increases. You can't change the balance and create more affordable housing without also taking action on the demand side or by subsidizing in some form below market price housing. A real world example of this would be Vancouver, which has consistently added supply over the decades, and currently has more housing starts than at any other point in the last several decades, and yet was continuing to see spiking property valuations. The Provincial government finally gave in and took action to limit demand, enacting a 15% tax on foreign purchases.