It is irrational but the same sort of irrational everyone is. Monkey need to survive winter so monkey stocks up on food/resources. Monkies never needed a ceiling for this behavior as there was never enough food. Now you have apes with a billion winters worth of stockpile yet that voice in their heads is still as loud as ever.
Don’t need to dig in. Just destroy factories, electrical transformers, oil infrastructure, and train yards.