What is this nonsense argument? Can you share more then one sentence about this?

NASA own analysis suggest that Falcon 9 development (just the initial nonreusable) version would have cost 10x as much (and that is with their estimation methods that often are wrong by 2-3x).

Do you also think NASA should build its own cars and planes to move around? Should they make their own spoons too?

What is your evidence that NASA could make things cheaper, or that they would be cheaper if NASA had tried to do it themselves.

We don't even have to base it on the study NASA did, they did develop the Ares 1 rocket during the same time when SpaceX developed Falcon 9. And NASA rocket cost many times what Falcon 9 cost and had little prospect of becoming much cheaper anytime soon and when canceled wasn't finish developing despite being based on existing well understood technology. In fact, only a complete redevelopment of the rocket from the ground up had any chance to ever match Falcon 9.

So we have both a theoretical study and a practical example that SpaceX Falcon 9 is vastly cheaper by an almost unimaginable large amount. And that is even before SpaceX on its own dime and on its own investment developed re-usability. And that made things even cheaper.

So can you please outline a realistic history where either now or in the next 20 years NASA would be cheaper then Falcon 9. Please assume the same amount of funding for the relevant project.

If you want to make the argument that somehow in 2050 it would be cheaper, I don't think you will win many people over with that logic.