
Well, they had to, to appease the public.

But they certainly wouldn't go out of their way to rename that bucket of bolts. Starfleet no doubt struggled to come up with a punishment that would look good in the public eye, finally settling on an obsolete starship with which Kirk could do the least harm.

An alternate and just as noncanonical explanation for "NCC-1701-A" would stem from the fact that Kirk wasn't exactly Starfleet's favorite officer at the time the public opinion necessitated "rewarding" him somehow.
