IMHO well, OK, IMO
There are times when a personal appearance by the old man, telling the truth will get the pax onside and take some of the strain off the CC.
OTTOMH only done it twice, once at the gate in Mombassa when a succession of crew illness & injuries (not social
) led to a delay and once in the aircraft on the ground - can't rmember why; another delay I guess.
Usually only done the "Goodbye" when flt deck shutdown wrapped up, inadvertently leap out & still disembarking - oops! OK, smile to the nice people who pay my salary.