In Irish law, busking is considered vagrancy - you can be arrested for it. It's risky asking people for money in public. So it's not like it's a high-art job. And people who do it as a high-art job make very little money.
The whole film is about people being convinced that they can reduce themselves to their archetypes.
If you're injured, it changes the way you move. If you're injured, it changes the way you talk.

