Purists and realists

I have recently been accused of taking a purist approach to problems - which I suppose is a fair enough criticism - as opposed to taking business and political realities into full account.

My point is that I try to act as Devil's advocate: someone will always remind me of the fact that I might not be proposing a "real" solution, taking a purist standpoint forces people to give me some useful feedback which I can then use to modify my point of view and my proposed solution. Is this an obtuse way of working?