Really interesting post - thanks. For me, the most important thing that studying Philosophy can do is to get people to ask questions and to consider the assumptions that are traditionally made. That is not to say their actions might ultimately be different, but at least they are able to recognise particular problems and difficulties... even if there are no absoultely convincing solutions.
I currently teach Philosophy in a Sports faculty and believe that it is useful in getting students that are not 'naturally' philosophical to realise there are philosophical and ethical problems that don't have 'easy' solutions. This is what I think is important and it is up to those of us with the more traditional philosophical training to make philosophy a useful enterprise in other disciplines.