Greek siege advantage question

So I've played for a few months now mostly as egyptian gods. On a lot of my 1v1 and team games it is easy to lose a stalemate in Heroic because adversary greek gods get their fortress catapult (starts with P) whereas if i want to make a push I have to go all out with siege towers or possibly chip away at stuff with chariot archers unless I make it to mythic age for my own catapults. Do you think greek gods were given access to this unit for balance purposes?