Just reading through the recent talk here, it strikes me that it's really focused on a rather specific sort of situation - that of people who are in some kind of actual or proto relationship. By relationship I mean friendship, colleagues at work, regular customers, extended family even. I very much agree that verification is essential here and not just of negative intuitions, but those warm glowing insights as well that can equally prove misleading in the testing.
But there are other situations when acting purely on intuition is a very good idea. For example, if I'm walking alone down a dark deserted street at night, and I see three dodgy looking guys further along and feel uneasy about the body language they are showing, then I'm not going to verify whether or not they are really OK - I'll simply find a way to avoid them. This is a situation where being wrong is not going to harm anyone, but finding out I am in fact correct by verification could be dangerous and not worth the attempt.
I think there are a lot of much less extreme examples of the same thing - avoiding getting buttonholed by the incipient party bore, spotting a sales pitch before they start really working on you, avoiding sensor love-ins, spotting the guy who's very likely to divert a work meeting for hours, etc. In all these cases, a bit of intuition can save a lot of tedious wasted time. It won't always be correct but that doesn't matter because no-one gets hurt as long as it's done discretely.
I agree with what
@Asa said some pages back though - this isn't necessarily Ni, though that can help. It's probably also linked to the common sense and the instincts that made us avoid predator danger in the forests at night in the days when we were all still swinging from trees.