It does bug me that the crew can't trust the gate staff at the other end of the airbridge to do their jobs. Twice in thirty feet
Oh, you mean the people perhaps on burger-flipper wages hired by your handling agent?
Who are processing a mob of people who cluster around the boarding entrance, all having the intelligence to assume that they have small children, need more time to board, are either flying in first or business class, have the alliance's premium card or - if we're boarding by row number - are all at the back of the aircraft.
And you're SERIOUSLY expecting them to remember their seat number for longer than 10 seconds?
I don't bother memorising ephemeral stuff that I can easily refer to and my seat number falls into that category. Which is why my boarding pass stub is in my hand until I get to my seat and give it to the flight attendant with my jacket