I'm western and skeptical. I was born in a spiritualist family where the concept of chakras were used as being a part of spiritual body. But for spiritualists the term "spiritual" is something supernatural and always unfalsifiable. I'm not satisfied with this way of thinking.
Recently I started to study old religions like Buddhism, Hinduism and indigenous beliefs, and I see that all of them have a naturalistic approach to explain how things work, like the body, nature, the cosmos, etc. That approach fits in my mind.
I have not found a description of supernatural reality in Hinduism. Occultism is usually used in esoteric beliefs. I know chakras are common in tantric practices and tantra is esoteric and I know chakras are not tantra-specific.
Were chakras in ancient India something occult and supernatural like the theosophists propose in the West, or just an abstract representation of something present in nature which the ancients didn't know scientifically?