You realize the house price obsession is rather uniquely British, right? It's a bit of a national stereotype to people outside the UK. In many countries it's considered normal to rent, including rich countries.
https://www.swissinfo.ch/eng/land-of-lessees_swiss-continue-...
Weirdly, the dominance of renting in Switzerland doesn't stop the Swiss having children. So this is really very much a media induced anxiety disorder of some sort. It's not rational to decide whether or not to have children based on whether you can get a mortgage.