What is the Critical Object Check, and why would you need approval at the object level rather than the RfC level?

Approvals are usually at RfC level, but some core business objects need approval at the workbench/customizing object level.

The Critical Object Check blacklists these objects: a developer changing a flagged object gets a warning and must go through a separate approval before it can import. Scope: ABAP only, workbench + customizing objects of SolMan-controlled transports (transports built outside ChaRM don't count); no pre-delivered critical objects — each org defines its own.