Exactly this, it is unrealistic given how quick it is to travel across the galaxy.
There should be some pockets of inhabited colonies all over the galaxy given the powerful FSD drives.
The galaxy seems populated in such a way that there were much worse FSD drives or people would travel in real time frozen.
Perhaps FD can now with these FSD drives we all have start doing community goals to inhabit over parts of the galaxy.
I don't think it's that strange. Yes you can set up a colony 1000ly from the bubble, but why bother? The shorter are your trade routes, the better. Time is money after all.