A great photo is a great photo. It's irrelevant what equipment was used.
I absolutely agree with this statement, as I'm sure most would. The problem comes when you seem to suggest that with skill, creativity or by sheer will you can use any camera to 'get the shot', whatever that may be. But there are so many instances where this is just not the case- high resolution macro work, deep space long exposures such as the Hubble space telescope, fast moving small targets. You could make some sort of shot, but would it be any good?