Thats just a part of strat fights. Like all those other little things that doesnt work as intended, it must be implemented into the war school of strat players.
A breach must be captured and your fighters hidden inside, else the enemies will use it for the same tactical reasons.
Its better than unbreakable wooden walls, but worse than properly destroyed stone walls.
If chadz could resolve the issue with just wishful thinking it would have been done already. Hence it must be more serious and would require more work than what strategus had for the past few months.