I think the big misunderstanding you and the parent commenter have is that you're conflating "large scale projects" with "far out projects". Just because both are large scale, doesn't make them the same thing.
Technologically complicated, Politically easy, "far out projects" or "moonshots", governments are relatively good. eg. putting the first man on the moon (politically easy: because of the competition with Russia).
Technologically easy, Politically complicated, "large scale projects", governments are (as the data shows) really, really bad at. eg. reforming the education system.
Some rationale: Humans looking for authority that then gain it, don't want to lose it. i.e. The dislike disruption. Government is run by humans with authority. It would then follow that governments don't like disruption.
Its extremely hard to politically justify disenfranchising all the poor performing teachers, administration, budget planners, healthcare workers, etc. even if it is actually in the best overall interest of society. Primarily because governments are a monopoly, and its in the best interest of all management (lower, middle or upper) in a monopoly to keep their controlling interests intact (and happy), regardless of productivity. As they say "keep things churning".