Put another way, there’s every bit of music to hear and experience from a crappy radio vs. a great sound system. Articulation, pitch manipulation, tempo, instrument usage, and dynamic choices come through pretty well even on a static-ey AM station.
I think that one would need a really good sounding stereo to hear these things. I have listened to many crappy AM radios and I'm pretty sure I couldn't hear someone slightly bending a note or adding just a touch of vibrato no matter how beautifully it was done by the artist on one. Articulation and dynamics? These don't exist on crummy systems.
Most musicians don't listen to stereos for enjoyment. For them listening to music means playing or listening to others play. What they want out of a stereo is very different from what audiophiles want, and there's nothing wrong with that. But as long as I am a non-musician music lover, I will listen to a great stereo over a crummy AM radio any day, and I will hear much more of the music through that great stereo. To hear more of the music is why I upgrade my stereo. The better it gets the more of what the musicians are doing I hear .