"Human in the loop" gets said a lot in AI conversations.

Sometimes it is useful.

Sometimes it is just a comforting phrase.

The real question is: which human, in which loop, with what authority?

A reviewer who cannot see the source data is not much of a control.

An approver who does not understand the model's failure modes is not much of a safeguard.

A manager who sees the issue three weeks later is not in the loop. They are reading the history.

Good AI design does not just add a person somewhere in the chain.

It makes the person's role clear enough to matter.