"All you folks that are saying definitions are stupid: fine! Stop using them. Stop calling modern composed music folk music, if you don't think definitions are important. Or is it just that you like the term folk music, and want it to mean whatever kind of music you like to listen to? "

Nope.

The reason we clump certain types of singer-songwriter and certain contemporary acoustic music into the term "folk music" is simply because IT IS FOLK MUSIC.   You have to deal with it.