It isn't about how much rights you have. If that were the case then Wiki Managers and Helpers would outrank local administrators as well. Also not every member of Fandom Staff has the same level of authority.
For example Interns or Fandom Staff members that aren't part of the Fandom Community Support team don't tend to get involved in community related matters, as it isn't something they've been tasked to do.
It is true that it is the property of the business at the end of the day. But that applies to the people that run the business and not the employees that work for them.