You're arguing the wrong direction, I think.

If the gov does not change zoning restrictions to something less restrictive, then the work will, by law, not be possible.

If they do, then it's POSSIBLE, but it's not up to gov't to MANDATE it.

Arguing that they shouldn't "loosen" the restrictions because the market _MIGHT_ determine it's still not worthwhile seems odd to me. Perhaps this is from a cultural bias.

The point of the article wasn't to make more housing required, it was to make it possible to do so. Perhaps in other countries/cultures/governments the incentives are different (market vs. gov), but this article is not that.