Those resources get diverted from other uses that might be far more efficient and effective.

FORBES: Connect

This is a fine spot from which to get a good shot at a missile coming from Russia, North Korea or China, but it would be far less effective against one originating in Iraq, Libya or any ship off the East Coast.

CENTERFORSECURITYPOLICY: A November Missile Defense

Research showed that Taxol can be made by fermenting the fungus in vats, but so far harvesting it from trees remains more cost effective.

FORBES: Magazine Article