I think the answer is "yes". To the user asking a question, closing it feels like a very hostile action and makes the site seem unfriendly and not welcoming. My feeling is that marginal questions should not be closed explicitly, but should simply remain open but voted to an appropriate score (including negative, even very negative).
The questions I'd close are the ones that are just gratuitously bad, in terms of being completely off-topic (eg, "how do I rebuild a Holley carburetor?"), or that having attacking / discriminatory language, obvious trolling (slashdot level stuff... GNAA references, etc.), and the like.
IOW, I'd rely on up/down votes for almost all moderation and save the "close hammer" for extreme situations.