A regular attender at a Sunday afternoon jazz gig I used to go to was an elderly woman who wasn't a musician, but who had a comprehensive knowledge of the Great American Songbook, including lyrics, no doubt because so many of the tunes had been pops in her youth. She would quietly sing along with what was being played, continuing with the melody and lyrics throughout improvised solos and always fitting with the changes. I guess she had a jazz sense!
Well, many jazz listeners can't hear the changes. Greg Abate, who tours in these parts regularly, told me that a local gig promoter, who must have heard thousands of hours of jazz, had no idea when a chorus started or ended.😒
I am not a musician (well, apart from a little blues piano), but I can recognize the changes of well known standards. In fact, I feel a bit lost when I can't identify the structure.
Like Mel Torme, "I Like to Recognize the Tune". 😀