As long as a belief like this makes you happy, this will lead to a contented life.
But the problem with unfounded beliefs is that there is now way to judge a good one from a bad one. All beliefs, all faiths must be equally respected as none can be criticised in detail, for their contradictions, their lack of evidence, let alone in their entirety.
And of course, this opens the door to respecting people who live their lives according to beliefs which we find abhorrent and inhuman. Because we have no mechanisms to criticise their faith as we admit no mechanisms for criticism of our faiths.
So who thinks FGM is valid and its adherents should be respected? What about human sacrifice? What about the caste system? What about suttee?