The muscles are there simply to serve the head. But that isn’t how traditional players work at all; musicians know that their muscles have a lot of stuff going on as well. They’re using their whole body to make music, in fact.
The tools are evolving, and people’s interests are evolving as well. So, suddenly people like to hear bands, people like Devendra Banhart or the xx, bands that make a kind of virtue of sloppiness.
Ambient Music must be able to accommodate many levels of listening attention without enforcing one in particular; it must be as ignorable as it is interesting.
The reason I don’t tour is that I don’t know how to front a band. What would I do? I can’t really play anything well enough to deal with that situation.
