I am a reluctant, but accomplished touring cyclist, and I've ridden hundreds of miles through American landscape that is positively hostile to pedestrians and vehicles operating at less-than-car scales. The assumption of cars has led urban designers to implement travel distances that are only grueling to traverse, and the interstitial spaces are inhospitable, bedecked with exhaust ports, bad lighting, narrow spaces or vast, entirely unfurnished without shade, let alone water or public facilities for miles, even, in larger towns. Sometimes, just crossing the street to go a kilometer I've found the American cityscape impassable without hopping in the car, and popping over a minimum of one (1) freeway exit.
That's just one aspect of the alien dimensions to which our environment's built.
Going from the Cupertino Hotel to One Infinite Loop on foot felt like I was risking life and limb, despite it having pedestrian lights [1].
[0] http://thetrendler.com/wp-content/uploads/2015/10/Maps-Icons...
That road was a 3-lanes-each-way road with no pedestrian crossing points. We just had to run across when there was a gap. It wasn't a fast road - there were plenty of traffic lights for traffic purposes - but still, nothing for pedestrians.
https://themreport.com/daily-dose/09-02-2020/as-more-stay-ho...
So either the source claims that the average apartment has three or more bedrooms (and this is false, very few 3BR+ apartments are built in most buildings), or that the average apartment offers palatial luxury. Maybe they miscalculated?
Translation: "As someone that lives in desirable parts of high cost of living areas, even the largest premium units are below the average square footage mentioned in that article, I generally try not to think about it but it is fascinating to see, I think I can relate to other people that earn enough to comfortably live in these areas, but it is not common to ever talk about being financially stable in an expensive area, lets go back to pretending that we are all struggling and 'got a good deal' on our 900 sq ft penthouse."