Originally Posted by
Max Angle
Many failures of safety and envelope protection systems result in them being locked out for the rest of the flight following a sensor or computer malfunction, you normally can't dispatch without them but if they fail in flight you continue with appropriate mitigations.
Concur, it comes down to the probability of you encountering the conditions the system is protecting against during the balance of the flight.
And note that if the flight indeed could not be completed safely under normal circumstances, you would have to design some kind of backup or alternative - even a "land immediately" type instruction doesn't alter the fact that it will take some period of time to get back on the ground, so you have at least to be able to achieve that minimum "continued safe flight and landing" in any case.