Please point your browser to https://www.fsf.org/ and view the source. Search the page for "" and see if the FSF really believes what you claim.
Basically, a musician can make a living, they just have to work their ass off to do it and won't always be playing the music they love, just like any other job.
It is impossible to enjoy idling thoroughly unless one has plenty of work to do. -- Jerome Klapka Jerome