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."
https://themreport.com/daily-dose/09-02-2020/as-more-stay-ho...