Because CPUs are the new workers.
(kind of obvious if we are knowledge workers now. At some point we had to invent the knowledge equivalent of a JCB or a steam engine)
Now this has lots of implications. Managers are there mostly to organise and supervise workers. If one tech bro can organise a thousand CPUs globally, what is his manager organising? How we treated managers was qualitatively different to how we treated workers (see Unions for example). So do we pay the tech bro what we used to pay his manager? Do we give the tech bro a key to the executive washroom? Should we pair him up with a "politician type" who can go to the meetings? Sort of like how YC funds 2 founders cos that is shown to work better?
Work theatre is still a thing, and becomes more performative the less impact your work has on any outcomes.
Twitter and Musk has been an inflection point. If firing basically anyone who did not commit code, if that works (for some definition of works) then we are in a new world.
"How do you manage a company through code?" - asking the same questions that were asked 500 years ago when we asked "how do you manage a company / state through written words?"