Apparently you do not know what a flow is. A flow is not “activated.” It is simply a series of steps. Each pilot has separate steps. It is the left seat pilot (not always the captain in an augmented crew with 3 or more pilots) that initiates the descent.
Every step is a crew step. NOTHING is automatic. And, you missed the first, most important step in the flow for EVERY airline on EVERY aircraft. Crew O2 On/100%. No hypoxia.
And when was your last Hypoxia Recognition Course?
As I said, if the pilot, OR FO, recognized Hypoxia, dialed down the altitude, and then passed out, it could explain the flight path we have seen.
And as I have proven, Hypoxia incidents HAVE happened in the Modern Era. The example I cited was the Helios crash from 2005.
Also as I have proven, a mod DOES exist for automatic autopilot override for emergency descent in the event of a cabin pressure loss.
At this time, all we are doing is speculating without facts, anyway.
I have a theory. That’s all it is, a theory, based on the limited amount of data available, and my own knowledge/experience.