Power surge in a large amount and instantaneously will potentially damage the devices. And would be more dangerous, when your electricity goes off and back on in a short time. It will cause a more significant power surge and also the electric current would 'invades' in into your device.
A classic example of an emotion creating a conclusion. Anyone can learn from numbers.
Power cycling is a standard voltage (ie 120 VAC) dropping to zero and then slowly climbing back towards the standard voltage again. A surge is a voltage that well exceeds that standard voltage.
Anyone can read numbers on surge protectors. A 120 volt protector has a 330 volt let-through voltage. That means it does absolutely nothing until a surge exists - well over 330 volts on a 120 volt service.
When power cycles, voltage does not even exceed 120 volts during restoration. Only reason that power restoration creates well over 330 volts - one make conclusions from emotions. One has violated even even what was taught in junior high science. One made conclusion only from wild speculation. And then posted those speculations as if fact.
Blackout and brownouts do not harm electronics. Only brownouts are potentially harmful ... to motorized appliances ... not electronics.