1) assistance to recognizing people (because low vision, because memory fails, because you have a lot of photos...)
2) ensure candidate X is actually candidate X and not a paid person to take the exam in name of candidate X
3) door access control (to replace/in addition to access card)
4) having your own X-Ray (like in Amazon Prime): identify an actor/actress/model
5) having your personal robot addressing you by name
Can you imagine the bureaucratic nightmare that would be unleashed upon yourself if "the system" decides you aren't who you say you are because of the way you aged, an injury, surgery or a few new freckles?
This already happens sometimes with birth certificates and identity theft, and it's awful for those who have to experience it. I'd hate to have a black box AI inflicting that upon others for inexplicable reasons.
Compared to using API in the cloud or purchasing Hikvision cameras.