I have never
had to use compressed air on any of my keyboards
to keep them working. Only to clean them up. And over the >20 years I've spent interacting with keyboards more or less daily, the only issues I can remember were direct results of fairly long use: broken keys (on the flimsier keyboards) or gunk buildup below the key. And those took years to happen.
The keyboards TFA discusses are all under 18 months old, some under 6.
I'm currently typing on a wireless Apple keyboard I bought in 2009 which I don't think I ever did any maintenance on aside from changing the batteries. I'd be aghast if I had to "do maintenance" on a keyboard less than 2 years old.
I think that's a big part of the issue here, Apple's previous keyboards[0] worked and were reliable (possible dislike of short key travel aside), the replacements were not exactly appreciated when released, that they also turn out to be pathologically unreliable compounds the problem.
[0] which IIRC they used from the first polycarbonate macbook up until they replaced it in the first-gen touchbar MBP, both on laptops and on "standalone" keyboard products