But as a place to ask advice from other experts and get a feel for how they're inclined to think about the issue, it's absolutely fantastic. And the reason why it's such a great platform for that kind of thing is that the interface goes to such great lengths to discourage drawn-out discussion. By making it hard for argumentative people to dominate the topic, it makes it possible to get a feel for what everyone's really thinking in a way that, to my knowledge, is unprecedented.

It's true that there is one little detail, the green checkbox, that isn't a good match for this use case. At least not if you think of it as a way to pick the one Objectively True[tm] answer. But to think of it that way is absurd. Even with concrete programming issues there's often more than one way to do it, and everyone knows that in those cases and many others the green checkbox really just indicates which option the question asker liked best.

And beyond that, it's just plain wrongheaded to suggest that there shouldn't be room for opinion at a place like SE. It's tantamount to saying that there's no room for discussing the difficult, nebulous problems that real professionals have to deal with on a daily basis, and that the site's really only intended for helping people with the one case in which we can always expect a single objective answer: Homework help.