"There is no plausible objective answer to this question, thus its not for StackOverflow."
The first half of that sentence is absolutely true. But judging by the enormous number of upvotes, StackOverflow itself (i.e., the people who make it up) disagrees about that second bit.
I fall on the side of Stack Overflow at large. Programming is, among other things, an art. Like in any art, there are sometimes situations where there is no objective answer, and the artisan needs to make a judgment call. And in those cases, a wise artisan may still wish to consider the opinions and experiences of other skilled artisans before deciding on an approach.
Stack Overflow has an excellent format for facilitating this, since it allows some people to share their opinion or experience, and for others to indicate whether they have a similar opinion or experience by simply upvoting that answer. The only thing in Stack Overflow that doesn't actually fit this use case is the green checkbox, but that can be ignored easily enough.
A forum, on the other hand, is a terrible fit for that use case. Forums are for having a conversation, not for getting a quick pulse of what other people are thinking. They leave no way to contribute other than adding an additional post, and they leave no way to get a quick idea of what everyone else is thinking other than reading every single item in the resulting mountain of posts and manually tabulating it all.
It's just possible that the SO masters have fallen out of touch with the SO community. To the extent that they have done so, they are a detriment to that community.