I agree with your basic point. Few things irritate me more than attending a "live concert" and instead hearing the PA system, which is certainly inferior to my home system in all aspects but ultimate sound pressure levels.
Acoustic instruments are the result of centuries of evolution and refinement, and as previously noted, are impossible to reproduce. I applaud the "unplugged" movement in popular music. Unfortunately, however, PA amplification has intruded into many traditional acoustic music presentations, like opera and folk music. This robs the audience, especially the young audience, of discovering the difference.
Acoustic instruments are the result of centuries of evolution and refinement, and as previously noted, are impossible to reproduce. I applaud the "unplugged" movement in popular music. Unfortunately, however, PA amplification has intruded into many traditional acoustic music presentations, like opera and folk music. This robs the audience, especially the young audience, of discovering the difference.