Deuteronomy 11:11 But the land you are crossing the Jordan to take possession of is a land of mountains and valleys that drinks rain from heaven.
Even when the Israelites were going into “a land flowing with milk and honey,” they were told what it would be like...
Not a land of flat plains where they would have to irrigate all the time to tend to crops, but a land of mountains and valleys where God would supply their water.
What God was saying is life would radically change for them and they would have to depend on Him more than before.