Tweaks

When did we go from "it can't hurt" to "produces a HUGE improvement in the sound" when talking about tweaks? Was it the "Lead Balloon" that did it with turntables or the "Arcici" stands with the Quad electrostats, oh so many years ago? Was it "Tube Traps"? Was it magic bricks to put on top of power amps? Now days audiophiles seem to argue over the type of loop in the carpet of the listening room and its effect on sound. Anything that is exagerated becomes insignificant. Have audiophiles gone wrong somewhere? Why not admit there is no difference in the sound, you just want to be on the safe side?