I disagree. Specs can tell you if your amp has enough power for your speakers. They can tell you if your amp will handle the impedance of your speakers. Specs can tell you if the character of the sound will change with the changing impedance of your speakers. Specs can tell you if what you are hearing is signal or distortion. Specs can tell you how efficient your amp is and how much energy you are wasting if you leave it on. Maybe none of that matters to you and perhaps ignorance is bliss. To a great many it is all relevant information that can be used to improve the performance of an audio system as well as lead to more accurate and enjoyable listening experiences.