I have been chuckling muchly at all the poncetastic nonsense about levels of playing and quantifying enjoyment etc.
Like it or not, for schoolchildren, music exam grades are a way to ascertain a rough level of competence.
Of course exams have limitations - don't they all, whether music, sports gradings, or academic? - but they do establish a broad level.
As I said earlier, I went through school not practising my exam pieces. As pointed out, they were boring, and I can't think of anything worse than hours of running through scales, or repeated going over and dissecting pieces. But that's me, and yay! for me, I never needed to. I just 'did it', and to a good level.
What I also did, of course, was play my main instrument (oboe) far more often than in just my instrumental lessons.
I played in the school orchestras (so 3 separate sessions a week, usually, more at performance times), as well as in a quartet (another session plus more if necessary at performance times). All in school time, so it didn't 'count' for me, at the time as extra curricular. I played for a while in a church music group with another instrument. I tootled around at home in my (rare - usually school holidays) spare time with various recorders, or with my brother clarinet, and later his guitars, just for fun.
All this added up to a lot of playing, but none of it was 'practice'. I can honestly say I could count on two hands the number of times I actually practised at home, after the age of 10ish.
Maybe I could have gone a lot further, who knows? I played to a level which satisfied me, and which pleased those around me (relatives watching concerts, judges at music competitions, music teachers - happy enough with the outcomes even if a little frustrated that I rarely practised), and which has left me able to pick up an instrument should I choose to and toot/strum/tap out a tune, and with a bit more time and concentration (a rare happening, sadly) play adequately enough.
And with enough knowledge to now be supporting my (considered gifted) musical child, as well as enough knowledge/expertise to be able to deliver some musical tuition to my severely disabled yet musically talented child (not an easy task, given her needs).
I lay no claims to being a fabulous musician, btw, but I don't scare the horses, don't sound like a cat being strangled, and am competent enough to still bring enjoyment and pleasure to anyone subjected to my efforts. And overall, music has been a part of a rounded education for me, as well as being a good balance for some of the other more serious (to me) things I have done with my life.