Is there anything stating women cannot wear their dress uniform instead of a bridal gown?

I've seen this post going around Facebook that's a female SM in blues taking a selfie and the caption reads something along the lines of "why can't I wear my dress uniform to my wedding, I've earned it." This makes no sense to me. There is, insofar as I've been able to find, no such restriction. Am I mistaken in calling BS on this as being yet another social justice warrior bit of false indignation or is there really something out there prohibiting a female SM from wearing their schnazzy blue threads at the alter?