If it is required for flight safety, I wouldn't think there would be a way to disable the system.
We pretty well train for everything one being “Runaway Trim” an uncommanded up or nose down, with a good coordinated crew you can deal with this pretty fast. Simply one guy flies the plane and the other pulls the circuit breakers. Prob Solved.
Since anything can fail on an A/C you have to have a way to turn it off
The prob here is that Boeing put out “Differances” training documentation not new manuals for the MAX, they published “Addendums” sheets of paper to be reviewed and placed in current manuals.
The plane doesn’t have a problem, it’s doing what it was designed for.. the problem is some airliines which aren’t strictly regulated as the US are slight on training.
These poor bastards were fighting them all the way to the ground simply because they were not aware the override, turn the A/P on and Disable the MCAS.
Boeing ‘s got troubles