No, Sweeney. "Folk" differs not in form but in derivation, as the 1954 definition states. "Community" is an elastic term and a community may be long or short lived, large or small, dependent on particular links or general, and physical or today virtual, and nothing about that undermines the 1954 definition.   There is nothing condescending or patronising as far as I can see in referring to a community as a community - and if there were, so what, it would still be a community.

You seek to build upon an error therefore when you proceed to assert that we have failed to define "folk music".

An immediate culture cannot be a heritage. A heritage is what those before you did, and from which you spring.