Don’t get me wrong, ethernet is always better.

That's the crazy part that deserves shitting on: this guy has ethernet in every room, yet he's complaining about (checks notes) not being able to easily use something worse! I mean, just look at this paragraph:

A plethora of architects, civil engineers, and project managers across Orange and Los Angeles counties in California all told me the same thing: Wi-Fi-penetrating materials typically aren’t a consideration unless it’s a large structure like an office building or warehouse; telecom technicians are called in then, but mainly to help with wiring. However, those same people told me they’ve been able to reduce construction costs significantly by wiring residences for ethernet as they are building them.

That "plethora" of experts is right, and the author is just fucking nuts.