It seems like we have users who tend to answer out of what they believe to be "common sense" and in some of our more general, everyday sort of questions some of these even sound like reasonable answers. The common sense applied seems to fit, the OP is content with the answer, future readers seem to find the answer helpful and things work out fine.
On the other hand...
Sometimes we have users who tend to answer out of what they believe to be "common sense" on some of our more niche questions. Basically they're applying what they believe to be common sense, to a question about an uncommon or less common situation.
It seems like this may be causing some problems.
The OP may be getting advice from someone who's effectively guessing at what the solution ought to be.
These answers often aren't exactly well supported. The reasoning may be explained, but there's often holes in the reasoning that the answerer doesn't see.
These answers can often be somewhat tone deaf, or offensive to people who have had experience with the situation in the question.
There's often no indication in the answer that it isn't based on experience, or research.
And perhaps worst of all... These answers being written by people who don't know that they don't know, are often voted to the top by other people who don't know that they don't know. This sometimes leaves other answers written by users who have direct knowledge of the subject unread by future readers, as they're sometimes 3 or more answers down the list.
This seems like it may be a problem that's somewhat unique to more subjective Stacks. To use a Stack Overflow comparison, if someone who'd never written a line of C# wrote an answer to a question specifically about C# it would probably end up voted into a hole, or deleted entirely. That doesn't happen here, because most of our answers aren't so easily tested, and many of our questions and answers are largely voted upon by people who may never be in the exact situation the question is about.
It seems that our "back it up" rule helps with this situation, but from what I'm seeing, I'm not sure that it helps enough.
Is this a problem? And if it is, what can we do about it?