I think this is all that needs to be said on these articles.
(There's a lot more that _could_ be said, such as how few actual birthing HN readers there are, but I think the economics is really simple at the root of it.)
Besides, even the countries with really the worst outlook and conditions aren't falling all that fast. Russia since the high point of the 1990s: https://www.worldometers.info/world-population/russia-popula...
If there is insufficient supply, housing prices go up.
[1] https://www.aljazeera.com/economy/2023/7/14/japans-abandoned...
[2] https://www.ey.com/en_us/strategy/declining-enrollment-in-pu...