Beyond all the stuff about editing etc, the reason this is an unreasonable expectation is that reporting is fundamentally a *search* for a story. To report in such a way that you'd never interview someone you didn't quote would require knowing the story ahead of time.
I can't believe I need to say this, but if, as a journalist, you use my time, research & expertise without quoting me, don't be surprised if I never return your call.