This idea that we don’t understand the internals of anything anymore and nothing is reliable is a mix of nostalgic cherry-picking and willful ignorance of a lot of counter-examples.
Sure, a bunch of consumer appliances are nebulous, but they are designed for those tradeoffs. It’s not like your old VHS player was designed specifically to be easy to repair either.
The author is complaining about their of advanced networking feature breaking on a router intended for consumers. Why they haven’t upgraded to a prosumer setup is a mystery - OpnSense on a mini PC combined with some wireless access points is one way to go that offers a lot more configurablility and control.
Complaining that not everyone can understand low level hardware is ignorant of all the really cool low level hardware and maker communities that have exploded in recent years, and it’s ignorant of the fact that specialization existed back in the “good old days” as well. For example, we had separate transmission and body shop specialists in the mid-century, you couldn’t just go to any mechanic to fix any problem with your car.
I’d like to see someone in the VHS era design a printed circuit board using CAD software and get it printed on-demand, then design an enclosure and 3D print it in their house for pennies. You can design your own keyboards and other electronic gadgets and basically own a little factory in your own home these days. You can share designs with ease and many of the tools are open source. The amount of sophistication accessible to the average person is incredible these days.