they literally don't have legs, something a modern breed can't do. way back when ancients were announced they made it pretty clear that was what ancients were going to be about, making dragons that don't quite fit into the modern breed standard because they don't wear apparel. I genuinely don't know where the idea the dragon breed in the dragon game should have new breeds that are "primitive" (yes they were created before moderns but that's no reason to think they would be more primitive since the same deities designed them lore wise) or "other" (people would not like it if they didn't look enough like dragons in their eyes and there's only so much othering you can do to a dragon while keeping it mainstream, and fr is a company that needs to make money and new dragons breeds must make them money why else would they want to increase production of them. having a niche breed only a select few like would be counter to that)