[giaour]

You're right, but I think everyone is looking at second-order effects where causal links are impossible to prove. [0] is recent research on how expanding housing stock (even just at the top end) will "expand affordability," although they, too, are mostly looking at the effect on rents.

The most overt statement of "we don't want to build more houses because it will decrease the value of existing houses" in recent memory was Trump[1], who is not exactly a reliable source (and whose whole brand prior to politics was destroying the character of established neighborhoods by building giant condo complexes).

[0]: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5780364 [1]: https://www.msn.com/en-us/money/general/trump-says-the-quiet...