I don't need to be told to hold the handrail when leaving the aircraft nor to be careful descending the steps
No, but if you fall down and break your neck, their lawyers can argue that you were given reasonable warning
How staff feel about it (I'm not talking about physical abuse here) is largely irrelevant!
That's got to be the dumbest statement I've read for a while - people's emotions determine, to a very great extent, how they perform.