I didn’t know we were arguing. I’m learning. So if that’s what we’re doing, don’t stop.
There are many people who can have extraordinary high levels of PACO2 (alveoli Pressure) vs. PaCO2 (arterial pressure.) If the Ph is maintained then survival is probable and likely to last for a good duration.
If a Person's CO2 gets very far out of normal, then the Ph is impacted, and death will ensue. There is no amount of Oxygen which can make that change. CO2 must be ventilated. Oxygenation is subordinate to that.
I am not certain that this will come across as sensible, but I am fighting my spell check while typing in this tiny box.