I think the answer is obvious.
If you don't hear, or don't think you hear, any difference or improvement by adding/subtracting something in your system, then don't do it.
I never really have understood the apparent "need" that some people have, for one fellow to tell the other fellow what he can and cannot hear.
I certainly understand people making helpful suggestions about gear selection, based on what has worked for them in their applications. But to make statements about people being "psychologically duped" is a bit over the top, in my opinion.