Balance in HotA.

No, I agree that the idea seems absurd at first glance. But I have a question: if a catapult is always available to all heroes during a castle siege, why is there a separate slot for it in the exchange window between heroes? Perhaps the developers initially didn't want to give it to all heroes by default and wanted to allow the possibility of transferring the catapult between heroes? When I was just starting to play Heroes, I was a bit confused by the fact that all artifacts and war machines could be removed/transferred, but the catapult couldn't. It seemed unnatural, but I got used to it. By the way, if they remove the catapult, they could add a hero who specializes in ballistics and brings it with him from the start. P.S. Damn, it just occurred to me that war machines can't be removed! Another question - why not?)))