The fact that NASA has a clear directive to spend an absolutely humongous amount of money on the moon over a relatively short time frame may have something to do with Elon Musk's interest.
False dichotomy. Military budget that can be spent on Elon’s business is probably less than what NASA is prepared to spend on a proven Earth-Moon-Earth service.
It's not a perfect false dichotomy, between people getting to keep their wealth and all of the things it could be spent on, there actually is a sum that has to balance to zero.