It's not insinuating anything like that. It's stating a simple fact that they got 6 Billion dollars for basically zero effort and resources. All of the things you've described are to allow people to buy more games. They cement valve simply as a store front and platform but not a game developer.
This is the point as to why Half life and most other games were basically dropped. Valve made 6 billion in passive income while trying to build a game selling and delivery platform. Even the best game in the world isn't going to make that kind of income and it's likely to take more effort than what they've done already.
Only if they ever offered it at all. Kind of 'once you put it out there, it's out there'