And yes, you can sit in defense, throw spells, and all that, but in that time, a knight will turn you into mincemeat because of empathy + a sharp mind (for rapid development of good events), and a trained stack will teleport (if it's lancers and they create such a mess...) and if it's paladins, then you understand, they'll destroy a stack or a large part of a stack, so you can't just sit and wait!
And all this time, we're training paladins not only after building the city, but much earlier!
