I think this is a lumpers/ splitters thing. The problem with a tree structure is that it assumes a very particular shape and you have to distort your understand

I think this is a lumpers/ splitters thing. The problem with a tree structure is that it assumes a very particular shape and you have to distort your understanding of the world to make that fit reality which has no such inherent pattern. So, the taxonomy isn't useless, but, it's also never sufficient.