That’s definitely a fair opinion - just unfortunate that enough people wouldn’t agree, or wouldn’t be able to afford $100 games, that that will probably never happen.
The other issue is that developers these days keep working on games after their release - often using information gained related to launch reception.
One other thing I think people forget about older games is that they made a lot of sequels. They have the assets for a mid-sized game and a lot of unused ideas, so to put out more content they remix what they have in new ways for a shorter development cycle. That kind of thing now becomes more suitable for an expansion pack; but whichever way it’s sold, the timeline for its release would never have made it to the first game’s production deadline.