Ehh, pearl clutching over homogeneity in art and architecture is par for the course. What the writer needs to do is expand their horizons, and possibly, their vertices. There's tons of options out there if you take a minute to look outside of -/checks notes/- ... AirBnB? Really? Is AirBnB a good place to find a representative sample of interior design diversity?
Also, homogeneity is great when properly deployed. Imagine going to a city and not having to think about how the street numbering system works, or how to navigate the metro, or how to find an ATM because of a human-centered design aesthetic that is built around routines of daily life, instead of the 9-5 commute.