Just my .02 but here it is. I don't think this is necessarily the entire reason but seems to me that you maximize it's roles in the requirements phase for a number of reasons. 1) when the program gets cut, which it inevitably will for budgetary reasons, you have something to fall back on. 2) if you're going to buy JSF, which the AF has committed to, you justify its existance by giving it a mission. Of course big AF and Navy for that matter understand that each aircraft can adapt to either mission and do it very well. So when it gets cut and bought and tested and sent into operational duties in it's current state, you can modify the mission to fit the needs. Not efficient but certainly viable. Case in point, the F-14 turned out to be one of the most lethal attack assets in the Navy for many years, not bad for an airplane designed around a missle. Your point is well taken however, but realize this: Raptor was not designed to fight the war on terror, nor will it necessarily. Think bigger picture and you will have your answer. For that, and I'm a Navy guy, it will be well served. Presence and capability go along way in deterrance. Again, just my .02.