not every woman of color identifies primarily as a "Womyn of Color".

That's fine for them.  For example, being half-Japanese, I could easily be considered/pass as a person of color.  But I do not identify as a "person of color", not even "primarily".  On the other hand, my sister, I believe, does identify as a "person of color".

The point of my sister's dance teacher was that there are women of color who do identify primarily as such.  And that is their own business, not yours or mine.

And one of her goals, as I quoted is

To create a network of support that validates the artistic practices and creativity of a group of women of color who have traditionally had difficulty in finding that support.

Her view was that white women, at least in Minnesota, cannot relate to the experiences of "women of color", and their experience would hamper in the fostering of that community/network of support for those women who do self-identify as women of color.

Truth unfolds in time through a communal process.