Wouldn’t it be wondrous if the galaxy had plentiful intragalactic public transit and we don’t have access because we’re the planetary equivalent of the suburbs?
Come on giant space Cthulhus, we haven't even discovered the Prothean Ruins in Mars yet!
And farther away there are not enough metals.
As best as we can tell we are at the distance where all other life would be.
Edit: Apologies, it seems it does not in fact use dark matter.
The existence of negative mass exotic matter remains an open question.
You are thinking of... a ghetto.