They needed a Tierra villian because Sean is such a painfully boring bachelor. I've noticed that in every season they pick a Bachelor who I'm surprised about because I thought he was so boring and undesirable on The Bachelorette, the season has a terribly crazy villian. I was shocked they chose Jake to be a bachelor, and he brought is Vienna. I was shocked they chose Sean, and that brought us Tierra. Some seasons, they cast a great guy the entire audience wants to date. Some seasons, they choose a boring guy and cast a bunch of crazy women to make up for it.