Ack- missed that- my bad!
Some people are born to be adventurers, others have adventure thrust upon them.
Not everyone on an adventure is perforce a master of combat.See Frodo & Sam.
See Avram Belinski.
See Peter Martin.
See many, many others in literature, TV and film.
I bet if you ran the challenge enthusiastically and in the manner suggested in that post, your players would think it's great.
And how many of those didn't face conflict or combat?
You would be wrong.
Not a DAMN one of those skills has anything at all to do with playing your instruments proficiently and/or with feeling- the bleeding heart of the challenge.
All that challenge describes is the process of finding the right piece to play and if you have the stamina to play it (if its a long one), not whether your performance can be described as "mechanical", "pedestrian", "soulful" or "brilliant".
Only part of it, since most of it is my own (I have no masonry, weapon/armormaking or metalworking skills). And all of it was accumulated before age 20. (I've improved since then, too.)
...
Again, see above: that background was an embellished version of my own teenaged years. Not exactly "elderly", and well within the age projections traditionally associated with many PC classes (at least, the more scholarly ones, like arcanists & divine casters).
Which misses the point of every instance this has occured in myth, legend and fiction.
The key to the challenge isn't whether you know what to play. Its whether you play so well you can beat the Devil (or his champion). It won't matter if you can pick the right piece if you can't play it. It won't matter if you make the audience laugh if they're not laughing at the right thing. In short, its about the performance- end of story.
What I prefer about doing that way is that the player isn't forced to make a decision between min/maxy skills that get used all the time in adventures and ones chosen more for flavor reasons but that come up in RP situations and the like. (I also wish utility powers didn't force that decision point as much as they do but that's a rant for another time.
Who's better - Bethoven or the Beatles? Elvis or Orpheus? More commonly in mythology you get stories like the story of Orpheus - where his songs were enough to soften Hades heart. It's normally about the right performance at the right time in the right way - and showing up with the wrong music for your target would fail utterly.
Yes it does- meaning STILL that there is no concept of actual skill in the challenge- all PCs of like attribute and level are indistinguishable in their arrtistic endeavors (sticking with the cuttin' heads example). And that is contra to the nature of the challenge.
Contra to simulationism, which seems to be the direction that you were going, but as has been said so many times 4e isn't necessarily about simulationism ("I think anyone who plays an instrument (like I do), or crafts things (as I do) or cooks (as I do) can take a bit of umbrage at this.")