I spoke to a manufacturer who said that excess power is a big threat to speakers more so than high frequency components of distortion burning out drivers. I’ve seen too many examples of accidents with high powered amps sending damaging pulses to speakers (someone accidentally pulling an interconnect, a power failure where flickering power results in a loud thump, etc.). I don’t get why people play their systems so loudly that they would burn out drivers from distortion—things will sound bad long before that point is reached.
If only a tweeter is blown, that could be from an amp heavily distorting because distortion is primarily high frequencies. But, other drivers are not getting those higher frequencies so if they blow, it is because too much power was delivered, regardless of distortion.
I think it is safer to stay on the lower end of a manufacturer’s recommended power requirement and then don’t listen at levels where distortion is evident.