Oh so you mean that he got vision on your base, called in the barrage with X amount of munitions and then forced a mass retreat of all your infantry to coincide with the bombing run?
In DoW2 if someone managed to throw a nuke in your base, you were already fucked anyway more often than not. The same is pretty much true here I think.
Yes, in case you did not know, you can easily recon your opponent's base with the recon strafe from the same commander. You can then use this vision to drop a bomb. That means from the moment he unlocks divebomb, your base is vulnerable for a nuke no matter what. You might have thought, "you can counter it by not letting your opponent scout your base." Well, there. You can't do that.
It's so quick that you can do it as a reactionary move AFTER your opponents retreat, especially in a large map.
So to answer your question, yes, you can, sincerely, do all of that. You can catch your opponent out, make him retreat, THEN recon his base, and drop a game-ending bomb. All you need is timing, but once you're aware of that, then it's all downhill from there.
Thanks for the questions, I'm glad I could educate just how cheesy this maneuver is.