It's funny you should cite Blade Runner which was the canonical case of a Director's Cut being very different from the editor's cut. A studio-produced film is made by a committee as a commerical product. One they can recall. There's actually tons of subtle edits than can happen between a theatrical release and a home video release that barely get noticed.

Not to mention Blade Runner was a book first and a remake most recently. There's no canon, it's fiction. And man, canon. The Christian Bible is edition of pure convenience based on centuries of oral fable. Trying to stamp a canonical version is anathema.