Because it adds no value and does nothing good for your system. It will not "tune" your amps correctly, not even close. If you think it will then perhaps you should describe how you'd use it and why you've selected to use it that way. O'scopes can do A TON of other things, but are also WAY overkill for what you want to do. I don't understand at all why anyone thinks they need to set their gain to the threshold of clipping in a system that is only being listened to. Complete idiotic idea. It won't help you protect ANYTHING. If you feel it might, then you don't understand the "tool" and definitely shouldn't use it. Its a gimmick that will make you feel overconfident and not at all help the cause. Please people. Think this over. What level are you CD's/mp3's or whatever recorded at? If you don't know then you CANNOT pick a clipping level for gain setting. You could pick an overly conservative one, but considering the target audience for the device that will just automatically make your system underwhelming. And no, there is no standard so YES all your music will be at different levels. If you want to set your gain before you listen to EVERY song based on the song then go for it and I would then agree this device could almost make sense...but you'd have to be a complete fucktard to want/need to do that.