Take, for example, this question. The last paragraph is an explanation of how the question isn't a duplicate and references meta for justification. This explanation is longer than the question itself. Is it reasonable to edit it out of the question?
I'm personally not a fan of reading instructions to not close a question, but I can see how sometimes it may be useful to explain the reasoning behind asking a question that at first glance may look like a great candidate for closing. I edited the question this time, since it looks like the "it's not a duplicate" plea was only relevant on SO, but what's the common approach to that sort of thing?