Operation Spiderweb was not a power projection exercise though, it was an espionage mission.
This is like arguing you don't need a military because you'll just have 1 spy turn the enemies own weapons on them.
Sure...its not that it can't work, but there's more then a few issues with the strategic plan.
Fair, it's not an aircraft carrier. But you can turn any container vessel into a cheap rough equivalent. Take the coastline, then maybe 30 km inland and see what installations you could reach. Pearl Harbor on a shoestring budget is a realistic threat now.