Threads and discussions are the life-blood of a site like this. And for this site in particular, the questions of beginners and folks with "issues" are our bread-and-butter, so to speak. It's what we're here for.
When people ask questions in a thread, they want to TALK about their problem with people that care...they don't want to be pointed to a wiki page and told to read it. We do have some basic reference threads/articles that we point people to in order to help pass on certain basic knowledge, but as often as not, people would rather have a conversation about their particular concern, regardless of whether or not the answers can be found in some referenced caresheet.
I also wouldn't feel comfortable saying who can and can not edit the content of such a page, and for sure our database is not set up to make that determination for us. High post counts or years of membership do not equate in any way to "expert" knowledge of animal husbandry.
I think a wiki for ball python care would be a great idea for someone to put together and manage....but not in any sort of direct association with BP.net.