jgsugden
Legend
True. You can reskin PCs into intelloigent mice and reskin all monsters into small animals, too. You can do anything.You can do absolutely all of that with virtually any creature type.
However, D&D is D&D ... and there are certain expectations common amongst players. When they finally face and kill a dragon, it is usually one of the iconic events in a campaign. It kind of robs the PCs if you entirely remove them ... but modifying them to make them more distinct and unique can enhance that iconic moment. YMMV.