I think what actually happens is that you can technically succeed in breaking through as long as you have enough spirituality, but failing to establish a virtuous cycle and a truly cultivated environment in your soul before you push forward is going to cripple you down the line. Certainly, it'll be a huge pain in the ass to clear the fields and build your estate if you didn't prepare the ground properly and then escalated everything to a new realm.
There's probably also a certain amount of "The more work you put in in earlier steps, the more it pays out down the line" going on too. There's probably serious diminishing returns on further Improving your Estate, but the more developed it is before you pull the trigger, the more benefits you get when you do.