There are also theories that they will prevent tinnitus because one can play music at a lower volume and still enjoy it.
I personally like to pick apart all of the layers of music and hear all of the nuance/production. At low volume this is generally not possible. Not all of us have audiophile tendencies though I suppose.
I've head some people suggest using AirPods Pro with ANC as a form of hearing protection at concerts--I think Apple might have even mentioned that in today's presentation.