From watching "Emissary" and the other very early DS9 episodes, it came to mind that, pre-pilot contunity, Bajor was just another world recovering from an occupation. The war itself was going on during the entire TNG run,yet you notice it wasn't important enough to warrant significant attention from the Federation. The occupation and resistance lasted over half a century- that meant that while Data was leaping amongst rocks in Encounter At Farpoint, Shakar was busy struggling to liberate his people. While Picard was exploring his afterlife regrets with Q, Kira's Dad was watching his garden burn.
We got hints and whispers of Bajor's struggles with Ensign Ro and a few limited encounters centered around Dukat's cousin, but not much more than that.
So now we get to Terok Nor- basically a dumped out way station with no real potential. In this crumpled wreck Starfleet saw a possibility- if the Federation played their cards right Bajor might eventually get its problems sorted out and join them. So they agreed to administer the station's operations- but even then it wasn't an important enough place to assign a permanent starship to, just a few runabouts.
If you notice that in the earliest episode Sisko admits he doesn't want to be there, and Kira doesn't believe the Federation itself will stick around either. Quark doesn't even have his real nose yet!
Of course then the Wormhole was found and within a few years DS9 became a crossroads for the most important events in the later ST years...
But back in the day it was just a backwards, run down, lonely place, constantly breaking down, little more than a place for a certain Sisko to cool his heels after the tragic death of his wife.