I understand the outcry over the heavy processes, but I think there are a lot of confusing statements here. The point being made is "methodology is bullshit," yet what is proposed is exactly that: a new methodology. "Fix a 60-day timeframe and do whatever fits" is a method. The truth is, everyone needs to be organized somehow, and this is why we invent methodologies, frameworks, processes - call it whatever you want…
"We're all adults here, we don't need these rules" was a wide spread sentiment, yet work was horribly inefficient. I remember projects where we would discover every 3 weeks, during a Jour Fixe, that the pieces we built did not fit together.
The Daily was fantastic because it was lightweight and short, but very frequent, so that communication flowed freely. The Retro was the catch-all meeting to bring up stuff (People forgot just how big the obstacles were back then - I remember having to wait 12 weeks for a config change that allowed my app to connect to the database). Recognising that one person who always tried to bring everyone together, calling them a Scrum Master and making room for them to do these tasks was a no-brainer.
The top-down recognition was useful - not only did projects go noticeably better, managers could also boast that they, too, are now doing this new Agile thing! And they didn't even need to do something!
That was all before Scrum of Scrums, SAFe, LeSS, you name it.
As you said, we've come full circle in many aspects. It's ironic.