She thought Sabine losing her family like Anakin lost his mom would lead her down the same path like her master. Once Ahsoka finds peace with her master and lets go of her guilt for not being there for Anakin, she's able to realize what she has to do with Sabine.Yeah. He flat out said that she had the least potential of any student he'd seen. Then it's revealed that Ahsoka was actually afraid of Sabine reaching her potential because of her potential to turn dark.