The passenger assist app allows staff to allocate a job to themselves, so if it's on there and someone has confirmed they're doing that assist then I am sure the train manager can also check and be confident in saying so?
It seems like a positive step to give someone reassurance. A lot of passengers can be nervous/anxious and this is the sort of thing that technology can be used for.
Then tell the person who requested it in the app? No need to have two automated and one manual announcement repeat it to a large number of people to whom it is irrelevant just to bulk out the airwaves a little longer?
I completely agree that it must be reassuring - if it is linked to the app, although I hear it so often (I couldn't confirm every station because I - unsurprisingly - try to tune out the audio assault) that I doubt it. However it also seems something that could more easily be more targeted to the people it will benefit rather than the entire train? Not to mention that if the person concerned received a direct notification - that's more useful for them then it just being folded into the general ongoing milieu of noise where they are more likely to miss it?
Anyway, my general point is that we often have exactly the same announcement 3 times, back-to-back, which was far more irritating than 61016, which in itself could be relegated to a poster-led campaign supported by occasional announcements now that it is in the consciousness of the travelling public.
On which note I must confess I don't quite understand why guards so often feel the need to repeat the auto-announcements anyway, what's the benefit? If they were adding new or different information then that would be one thing, or replacing the auto-announcements because they want to pretend to be a radio DJ, that's fine, but why have both?!