Er, genius, this was a demonstration flight and an incredibly successful one at that. Even if the capsule were to burn up on re-entry, the most important milestones have been met, and there were many. There was no need to take a max load of cargo this time.
At any rate Falcon Heavy will be able to deliver 55,000 kg to orbit - more than twice as much as the Space Shuttle, Delta IV Heavy, Titan IV-B or the Russian Proton M. Happy now?
As I said before, SpaceX is walking the walk.
NASA is supplying at least half of the funding and its launch and tracking facilties supported the flight. This is supposed to be a public-private partnership. SpaceX did not do this on its own.