I'm not sure why anyone should think that workshops, organised by clubs or otherwise, should 'standardise' anything. I don't think anyone is suggesting having to pass any kind of test.
Our club runs workshops whenever the chance arises for someone knowledgeable to lead them, and on a variety of subjects, with the aim of improving performance skills of all sorts, as well as songwriting.
And they have made a difference to many people involved in the club, as well as those who have attended from a wide area around.
And one of the workshops was entitled, 'How to make a song your own' - hardly 'standardisation'! :-)