Wikipedia admins are not IT admins, they're more like forum moderators or admins on a free phpBB 2 hosting service in 2005. They don't have "admin" access to backend systems. Those are the WMF sysadmins.

This is half true, because Wikipedia admins had the ability to edit sitewide JavaScript until 2018.

A certain number of "community" admins maintain that right to this day after it was realized this was a massive security hole.