Right- in the FedEx case it was a last ditch effort to literally knock the suicidal flight crew member off his balance and regain control of the aircraft. If you have a 'nanny' computer telling you that you're unable to do that, those crewmembers may have ended up dead instead.
Point being, in an unforeseen emergency, allowing crews to override the normal safety mechanisms may in fact save lives.
I guess the question is what's the likelihood of such a situation, vs the likelihood of the situation where a 'nanny' computer prevents the crew doing something dangerous?
The MAX crews had the option to turn off the stab trim. Of the 3 MAX incidents, only one of them turned it off, which is why you only hear about the other 2.
Point being, in an unforeseen emergency, allowing crews to override the normal safety mechanisms may in fact save lives.