Total BS.The service advisor says not to change the relay because "the F1 pump has a finite service life" irregardless of the relay failing so replacement is inevitable.
Of course mechanical/hydraulic/electric things DO FAIL at some stage, the only issue is that the MTBF of the relay is MUCH SHORTER than the one for the pump. Even then, that spare costs nothing relative to the full pump, takes no-time to replace, and even if the pump goes the following day it is worth the expense and time (which, again, is peanuts).
But guess a money making cow is taken away from stealerships whenever people do this sort of preventive maintenance...
Not on the markup on the spare (in itself expensive) but on labor.