Basically, what you are saying is that it is wrong to ask what listeners feel about stations and programming (focus groups) and what songs they want to hear and what they don't want to hear (music tests).
Steve Jobs hated focus groups and refused to use them. Had he relied what people "felt" about computers we wouldn't have an iPad or an iPhone today because no focus group could have envisioned the way these devices work.
It took a brilliant designer with nearly absolute power -- unencumbered by the usual corporate researching and foot-dragging -- to create something that nobody even knew they wanted.
Some of the most loved and most successful TV series are ones that "tested" horribly during the first season (back in the days when a show wasn't pulled the moment a focus group's needle began to drop.)
Despite today's focus group mentality, Microsoft survives, TV survives, Radio (we hope) will survive, but that doesn't mean there's anything creative going on. Mediocrity can and does make money -- that's not the issue. It's just that mediocrity is, well, mediocre.