[yadingus]

The other practices also have an effect on your body and mind, you just don't bother verifying it for yourself because you want an external authority to do it for you first.

You don't need to buy into the esoteric teachings, or even the core belief of reincarnation. But you don't have to reject them either. Just inform yourself on the basics and keep them in mind. "If this bit was true, what would the world be like? How would my actions impact the world? How would they impact my future self?"

In the end the whole point is reducing suffering, and the longer you wait for someone else to verify one claim or another, the longer you're going to be bound to your habitual suffering.