On that basis then, Mormonism, Scientology and Islam are all equally as valid?
Potentially, yes. That is where the next stage of the process of discernment comes in. Do they ring true with existing beliefs, for instance. Do they move humanity on from what other faiths teach?
Having studied all 3 to some degree or other, I'd say that the only one that satisfies the first criteria is Islam, but none of them satisfy the 2nd.
How quickly nonsense is accepted doesn't change the fact that it's nonsense.
O.
Nor does it prove that what some regard as nonsense is actually nonsense.