Supercharging investment and overproduction into a sector that is on a tipping point from shortage back to oversupply is a pretty quick way of generating a financial market crash
Sorry, this is strawmanning yimby. In what universe does "yes in MY back yard" imply giving decisions to government technocrats?
That's a productive bubble. There are unproductive bubbles, from tulips to crypto, but productive ones, like canals or railroads or housing (back in the 19thC) can be good, even if some investors are burned. Lowering prices needs oversupply, therefore people need to act irrationally.
Yes, except supercharging investment by gov is not what yimby proposes. (And by the way, the quality of the UK housing stock is so appalling, that a huge investment is needed - not by government decree, but happening endogenously thru freeing up planning laws)
With the caveat that the differences within the UK are mostly demand-driven, due to the same planning regime. In the US, these differences are regulation-driven due to different zoning rules across locations.