The StackExchange network was created to be a cross-over of wikis, Reddit, blogs and forums. It is hardly a forum.
In particular, it was decided that we didn't want some features of forums:
- We don't have threading
- We strongly discourage multiple postings by the same author
- Comments are second class with respect to posts and are quite disposable.
Furthermore, we have a tons of cool stuff that forums don't have, and which makes this place a very strange one if you expect to find a forum.
- We encourage editing. Anyone can edit your or other people posts.
- Your content is not yours. All posts are community owned via a creative commons license.
- With reputation, users gain moderator powers. This makes elected (diamond) mods more like exception handlers than mods. For example, only diamond mods can access private information or do user admin.
- closure and deletion, in particular, are community guided and can easily be undone. A diamond mod can't force anything in this respect, a part from locking posts, which is rarely if ever done.
Finally, skeptics has even more weird rules:
- Questions must be about a notable claim (i. e. a bunch of adults must be convinced of it)
- Answers must based on scientific or historical research and not be the mere opinion/speculation/anecdote/experiment of a user.
I suspect that most of those questions were closed because they violated one of the above guidelines. Note that closure is a special "maintenance mode" for questions that need fixing.