User blog comment:BertH/Anonymous editing and your community/@comment-3495717-20150723130006/@comment-7114405-20150723141007

Coming from the MUGEN Database as well, I would have preferred a separate option to just stop anons creating pages on top of the option of stopping them from editing outright, as anonymous vandalism is usually easy to identify and can be reverted in about 10 seconds or so, whereas vandal/spam pages created by anons take slightly longer to clean up.

The other reason why having an 'anons can edit but not created pages' option is that anyone (even anons themselves) can revert edit vandalism, whereas vandal/spam created pages can only deleted by those with administrator or janitorial rights.