I guess somebody has to practice a severe engine ,damage check list of some sort but in all my memory I can't think of one event where both rotors seized or even where a non fire shutdown without A/C vibes saved the day.
Way too many old wives tales about "why" relative to loss of n1 and n2 not associated with a departed engine.
Don't get me wrong, I'm all for pilot training about when to fly and when to read a checklist but let's not outthink the causal details.