It probably hinges on how rapidly the field of battle is evolving.

Do you want your bomb to at least attempt to adapt in realtime to novel targets? To novel means of camouflage, defense, and even interdiction (rather than wait for reports in the field to eventually prompt a software patch to upgrade the weapons system)? Well, the bomb is going to have to be considerably smarter to do so.

Of course, there are just as many ways that sort of on-board capability can go awry. I imagine that painting noncombatant symbols (or the equivalent adversarial input) on combat vehicle roofs may serve to fool overly smart munitions for a short while, for example.