Here’s another example.
Russia has 39 IPC’s and buys 13 infantry. The only complexes Russia controls are Moscow and Stalingrad. The Russian player intends to attack some German infantry in Rostov and leave an infantry blocker to keep the German tank and mech stack in the Ukraine from storming Stalingrad next turn.
The dice fail him, and the Russian player loses all his infantry in the attack on Rostov, and is unable to block. Now he doesn’t want to place 3 infantry in Stalingrad because they will get annihilated and probably only score 1 hit on a mech. He would much rather have the 3 extra infantry in Moscow the next turn, now that he knows the attack in Rostov failed.
Triple A would let him hold it back, and a lot of players would probably assume it’s legal. But like Veqryn says in his disclaimer, it’s the players’ responsibility to know the rules. Might as well make a note of it if you’re not going to fix it, though. I mean, there are a lot of rules and most players don’t bother to learn every single one accurately. They’re going to depend on the engine sometimes.