Stewards are actually global bureaucrats though. It’s just that their use of these powers is functionally limited to booting abusers and picking a new bureaucrat if the local ones are all inactive. No one wants to assert local mod rights except on reverting vandalism campaigns; since we have no profit motive, we’d rather just close abusive wikis rather than try to replace the mod staff.
"Kitto daijoubu da yo." - Sakura Kinomoto