Here's my view of the situation:
Everyone in AW has the ability to sing a song.
People who take the Move "Artful and Gracious" are simply better at doing their artful thing, which could be singing a song, than people who don't have the move.
This is expressed in the fact that they get a mechanical benefit for doing it.
Normally, singing a song is a (Relatively) low risk activity. Most people probably aren't going to be hit with a Hard Move for doing it.
If there was a mechanical risk in doing it while you had Artful and Gracious, than people with A&G wouldn't be simply better at doing their artful thing, and the rules wouldn't match the fiction, which would be a bigger no-no than rolls with no outcomes.
Compare with Things Speak:
The only people who have the ability to tell what strong emotions have been near an object by handling it are people with the Things Speak Move.
People with the Things Speak move are simply better than everyone else at handling objects and telling what strong emotions have been near it, because no one else can even try.
When you add a risk to that ability, you don't take away the fact that the person with Things Speak is simply better at doing what they do than anyone else.
Compare with Frenzy:
Frenzy is similar to Artful and Gracious.
Frenzy has more powerful effects (Probably) than Artful and Gracious.
Frenzy sticks a roll into a risky situation (Speaking truth to a mob), while A&G sticks a roll into a low-risk situation (Singing a song)
Even with mechanical risks, the rules of Frenzy mean that if you want to be a crowd agitator, you take Frenzy. The fiction matches, the potential risk works, the move is a slam dunk across all priorities.