You've obviously never met, talked to, or worked with the professionals that man the astronaut corp. Your comments with regard to good, decent human beings whom you have never met are incorrect, rude, and especially today, insensitive and very much out of line.
NASA has always had a professional 'tension' between its manned and unmanned side. This occurs in any organization that has competing interests for resources. In addition, like it or not, NASA is a political tool, used by congress and administrations as a carrot to other nations, incentive to join us in partnerships, and a symbol of national power. Scientifically, a robotic mission to mars is worth a lot. Politically, manned presence in space is worth 100 robotic missions.