Right now I am erring on the side of caution; I'd rather write something obvious to everyone than skip an inferential distance somewhere.

That seems like the best policy to me, especially for a site like LW. Perhaps on OB that could be a concern, but here where it's so easy to avoid the posts you don't want to read or which aren't upvoted much, having redundant information doesn't seem like it would be too much of a problem.