I think we should be able to tell towers what to do.

Ra's argument against is entirely based on balance. But the argument for is simply logic and history. The commander of a city can't direct the towers where to fire? At all??? That's just illogical. Next thing you know, because human players win so easy. you'll say we don't need to control troops either...

It's not about balance, it's about the choices I COULD have made as a military commander that I can't. Yet.

"Tell the towers to fire on that battering ram before they have the gate in pieces!"

"Sorry sir, we can't let you do that?"

"And WHY NOT?"

"Wouldn't be sporting, we have to give those chaps out there a fairer chance to kill us all."