Honoring the Enterprise name is a bone to the fans, but the general populace of the UFP or the top brass of Starfleet shouldn't think anything more of a hull with Enterprise painted on it than they should of a hull with Pansy painted on it.
Yes, that's probably the real life reason behind it. "In-Universe", however, I think it had been intended as a psychological message to the Romulans, who had suffered plenty of humiliation from the Enterprise
Would also explain why the Romulans in TNG were constantly eager to get their hands on yet another Enterprise
. The name of the ship and its registry must be something like a red flag for any Romulan.