You have good points Fay2, but i'd like to point a few things out that may oppose your thinking:
- The World of Darkness/The Void - the world formerly known as the 13th does not follow the same conventions as the other shards. It is broken, and any dimensional integrity it might have had as a shard is gone. If each of the worlds have a sort of safety bubble around them, the 13th does not, so it is a lot simpler to open a small hole in one bubble and then into what is essentially empty space, then it is to then open another hole in another bubble
- The Chrysalis - This area is supposed to be between dimensions, and thus seems more likely to follow along with the 'opening a hole into empty space' idea I explained
- The Inter-dimensional Rift - Not one of the shards, but a relatively small pocket dimension with a portal leading into it forcibly kept open by Omega. Once Omega was gone, the dimension itself began to collapse, and the portal along with it. As such, can we conclusively use the rules for this piece of out of world travel for the shards?
- The Blessing of Light - This example of people being drawn into the Aetherial realm might be the best for your theory, since we know that everyone present physically went there. But in order to actually go to the first shard, the WoDs had to subject themselves to the natural flow of life and death, while Minfillia seemed to be more like an Ascian in nature at that point.
EDIT: I feel like I could have worded this better.