Interesting, however there is an older definition of Faith that I'd like to put forth: it's the virtue by which the intellect gives assent to the truths revealed by God because we know He cannot deceive nor be deceived.

If we define Faith as being "whatever isn't logic or reason", indeed, I see no reason to believe in any particular religion, since Faith becomes a synonym for trust. And we may or may not trust person x, y or z based on an infinite number of reasons.

It took many ages of men to travel from Arda to this realm. Thank you.