The "marketing manager" role at Uber is an operations role and part of a local operations teams. Your main job is not "brand marketing" but attracting new drivers and managing local incentive spend.

They've most likely (wisely) decided to centralize those decisions, so not a huge surprise.

FWIW, the operations teams (small, local, non-technical teams stationed random cities around the world) built Uber into what it is today. Scaling/automating those jobs was always an inevitable.