Cut “dead” roots?

[WaterWitchin]

I'm following this one closely. I would also like some Nyeintific research on that one, if any is around. I surely understand the stripping off rotten velamen, I understand the stability issue. I too have been skeptical about what that little white string may or may not be doing. A lot of experienced growers also do other stuff I may or may not do or agree with. For example, I whack away at ugly leaves that bother me. A lot of experienced growers say not to. But I raise plants by the "gut feeling" for the most part. Always have. Is this kind of like the peroxide conversation we had a ways back? As far as professional growers go... a whole different ballgame in my opinion. If professional grower means someone who grows/produces for profit. Way out of my culture or desire.