Even with normalization, you can just sprinkle an arbitrary selection of non breaking zero width space characters into a string and create an infinite variety o

Even with normalization, you can just sprinkle an arbitrary selection of non breaking zero width space characters into a string and create an infinite variety of identical-looking but distinct codepoint sequences. Treating filenames as bundles of bytes is fine, but at that point it seems dangerous to assume that interpreting them as encoded strings is a valid way of distinguishing them.