It's impossible for anyone, radio, TV, or social media, to predict in the future, what media consumers want. "Missing the mark" as you put it; means something gets tried and falls flat, or at least doesn't gain significant traction. If one doesn't try, one will never find success. But those who are successful, find stacking the deck in their favor through proper research in advance, stand a better chance of success. And what is listening to listeners? Research.
And let me guess; if someone were to 'listen to you' you would say that music radio stations should have a 3,000 song playlist, and only play the variety that you personally expect to hear? If so, that opinion is nothing new around these parts. They call what radio does: Broadcasting, as in, broad to a wide audience. What someone with the everything-and-only-what-I-want, is called streaming.
Yes, it's called research.
I don't know of any radio programmer or GM who feels it ain't broke. If you hadn't noticed, over the past twenty years, there is a lot more competition for your attention. Many on this very board, have aired their frustration that radio has changed into something that no longer includes yakky jocks talking up to vocals, or time checks, or back-timing to the top of the hour newscast, or whatever. Instead, radio has reduced the talk to compete with personal playlists and streaming. So, not sure what radio stations you're listening-to, but believe me, a lot has changed since you were a kid.