It is precisely a rule to punish intentions, which is why we haven’t simply changed the code to prohibit moving the capital while in wartime.
And if other realms were to be moving their capital to the region which gave the realm their name, and which was the realm’s capital for more RL years than most realms in this game have existed, I can assure you that the Titans would look more favorably on them, as well.
However, that said, even that would not be enough to prevent my and/or the Titans’ wrath from falling upon a realm that made such a move with any real indication that it was done with the intention of improving refit times.