Earlier quoted context omitted.
You take it as a given that the private sector is well-run and wise. Nobody is saying either solution is great. All it's saying is that: wouldn't it be better to have all this power be in the hands of the democratically chosen, versus billionaires who may or may not be making relevant investments? edit: Just downvotes, no response?
I take it as a given that, when a private individual uses their money, at least one person probably thought the way it was used was a good idea. I do not take it as a given that, when the government spends money, anyone thought how it was spent was a good idea (like spending 8 billion dollars to design a tank... yes, that's billions, with a "b" (also, I love that movie))
Furthermore, all you're doing is cherry picking data points to support your argument without factoring in that military and medical equipment all have huge, onerous requirements for tracking every step of the supply chain, to the mine the metal came out of, which makes cost structures very weird.
What about the Manhattan Project, or the Hoover Dam, or the Interstate System. Bad investments? See, I can cherry pick too.