When dungeons have paths people just pick one and stick to it, so I see no point.

Look in the old dungeons that had chests in places outside the main path, like AK. No one ever hunted them. SE already realized that and that's why new dungeons all have a single path.

On paper it surely nice to not have 1 path but in reality even if there are more paths people will just pick one (except a few players who will do it for the sake of it but the numbers would probably be negligible)...