Ignorance is bliss. Ever heard of Feng Shui? The concept of Shamanism is similar to Feng Shui and there's a difference between correcting the spiritual and the physical.
Funny thing is once some guy had a dream about evil spirits/ghosts and he told the Shaman priest and his parents about them haunting him several days, they told him not to worry because dreams were nothing but ruse. At first believe then after that don't believe in spirits anymore.
What's the point of performing jingle bell if their belief don't align with their practice. Seem like contradiction, don't you think? Make up y'all dayum mind!!