Plans change, so you leave a note, or trust their ability to find you.
Part of the reluctance is that it does impinge. Counterintuitively, it seems to hold stuff up. Anyone who embarked at Southampton, while Covid was still taken seriously, will remember how much longer the queue took when you were behind someone who had all their docs. on their phone, but could never quite find them, compared to being behind someone brandishing an easily accessible sheaf of paper docs.
Strange how this market research never lights on me, who has never done any of the things you mention, despite being youngish for Cunard. Why on earth do people want to look at family photos, when they’ll be back in a fortnight?