What is it that makes weaponized drones more 'humane' than land mines, poison gas, cluster bombs, biological weapons, nuclear weapons, and other weapons worth banning?

"the major problem with the U.S. drone campaign is not the technologies utilized but the underlying ethos that the United States can do anything it wants in the name of national security, wherever, whenever and to whomever it pleases, without any accountability. This is a problem that transcends the use of drones...