I really do not see this discussion as "us vs. them". The beauty of flats is that we all do different styles, scales and subjects; and it's all good! We are a brotherhood (including the Ladies!) of artists, and passionate about what we do. Why do we all have to do the same thing? What fun would that be?
I don't hold with the opinion of "Anything that is not metal or not X scale, (etc, etc,) is not a "true flat." While there are those with such opinions, and I respect them; we're all entitled to our own views on the subject. There is room for everyone. I would only object if someone began forcing his views on others: e.g. only 30mm may be shown or judged or not judged. I don't see anything close to that happening here.
My advice is this: If you feel 30mm's are ignored, then paint some outstanding figures, present them in a dynamic way, and display them at shows and elsewhere. I think we are all influenced by what we see at shows, and you may start grabbing the attention you wish.
I certainly appreciate 30mm's, respect the artistry involved, and have painted some in my day; but I just find them too hard to see. I think much of the show audience has this problem, so consider this in your display. For example, display them on a stand at eye level, provide a magnifying media of some kind, etc. Who knows, you may star a whole new trend?