The Prophet’s dislike for standing up in respect for him by his
followers was an expression of humility on his part, and of course does not mean
that standing up in respect for someone is a bad thing. The Prophet (sws) did
not like it for himself, and many of our own elders do not like it either.
If an elderly and respectful person for whom you stand up stops you from
doing so, then your compliance in this regard is out of sheer respect for his
wishes, otherwise he certainly deserves this since standing up for him is just
meant to show respect to him.