There’s a kind of qualitative difference between a game that was built to be played and later has DLC released for it and a game that is essentially built as a DLC platform. The latter has become extremely common in AAA games and it winds up feeling incomplete because the insertion points for planned DLC are usually quite noticable.
I think this definition gets diluted by those who would call something like a Paradox game incomplete just because there are only so many features you can build for a systems-driven game like that in a few years of development time, and they naturally expand on it over time. But out of dozens of expansions, there are people who say all of them are absolutely necessary to get the “complete” experience when realistically they’d never engage with even half of the expansion features anyway.