that was the reason why they did they, to allow the creator who has left the company to be removed. But instead of creating a system to transfer ownership of a page, they just gave every admin the ability to delete any other admin.
Tangor: It wasn't a primary system! at first the creator was protected. Adding an Admin was similar to making someone a mod of a forum "like a brand loyalist". the owner controlled the forum but the mod could help clean up spam, and get some brownie points for being named made as admin. Same system is here on Webmaster World.