Why don't we pull the help center copy from special community wiki answers on Meta? This way, ordinary users can help improve the help center.
The Help Center is a site's official guidance. It should change after consideration, not as a side-effect of somebody deciding he wants something new to be on-topic so, hey, let's just edit my favorite topic right into the list. Yes it can be cleaned up, but in the meantime it'll confuse or mislead people who go to the Help Center looking for help.
CW posts don't require much reputation to edit, and even high-rep users make mistakes or, occasionally, rage-quit. A site's official guidance shouldn't be directly editable by users whose contributions might not be accurate. Working out the content on meta and having a moderator push the text is sufficient, and safer.