It is a part of the job we have? [ Had? Ingo doesn't really remember, and— well, never mind that— but he still does it, what tense works best here... ] Becomes a habit! Safety checks are important. Point and acknowledge is just one part of keeping passengers safe. Acknowledging something, declaring intent or status out loud— helps with focus, means you're paying attention.

Else you might get things like distracted conductors opening the train doors in the middle of a tunnel and not at the platform.

[ Does this actually mean anything to these two, though. ]