Why is spirituality so widely accepted without any factual evidence backing it up?

[Anonymous]

Spirituality has no factual backing. Once someone has awaken the Rinnegan or their Sharingan, I will accept spirituality as a factual science.

Updates:

[jshm2]

Because it is not a hypothesis, jackass. It is not a physical thing that needs to be able to be tested and quantified.

Science can only deal with the quantifiable and physical. Anything else is outside it's purview. i. e Science cannot tell you murder or rape is "wrong". It can conduct tests for effects and help build a case for damages done. But even those are dependent on many non physical factors and subjectivity. Hence why courts and trials are required despite the facts and any evidence in a case.

Spirituality is not about the physical, but a lot more than that.

[Lionman95]

Because we don´t live in a total materialistic world if would there wouldn´t be good and bad either.

[Quackthulu]

Because people are too afraid to be able to think for themselves.

[CarneConChile]

Well... this and that.