I would say you're right, except for the part about that being present in Deep Space Nine more so than the other series.
You can find all kinds of examples of this kind of continuity and world-building in TNG. The fictional worlds of DS9 and Voyager were literally built in TNG with episodes like The Wounded, Ensign Ro, Chain of Command, Lower Decks, Journey's End, Pre-emptive Strike... You may not be as interested in the themes and characters being developed on TNG as you are with the ones on DS9, but they're still there.
I'm not arguing that it didn't exist in TNG. As I said, I love TNG. I just feel there was more development in DS9 -- not more as in quantity, but more as in DEEPER, much more time and more attention given to specific cultures and characters making the development more complex, and that development helped to build a broader story. They had to do it that way because the station wasn't going anywhere and the mission this time was not to explore strange new worlds. TNG did indeed introduce and develop characters, aliens and cultures, and they were interesting (never said they weren't), but there was not a larger, complex story there that encompassed the series. In other words, the development of the characters and cultures were mostly contained to individual stories that were resolved quickly, and then it was time to move on and continue the mission of exploring. Yes they revisited many of those cultures and developed them further, but they didn't live
with those cultures the way DS9 did simply because they moved around the galaxy a lot more. And there's not a thing wrong with that! They were just two different kinds of shows. It's not an elitist argument, it's just the nature of each show. And I love them both.