I think one of the most common mistakes that Christians in general and Latter-day Saints in particular make is thinking that the church is a community build around common beliefs rather than the common experience of repentance and conversion.

Yes, we will have some beliefs in common, but I don't think that's where the focus ought to be.

One of the early revelations to Martin Harris, says "of tenets thou shalt not talk, but thou shalt declare repentance and faith on the Savior, and remission of sins by baptism, and by fire, yea, even the Holy Ghost."

Now, you could get cynical about it and say "ah, but faith in Christ is a tenet, so it is incoherent to say that we shouldn't talk of tenets but that we should declare faith in Christ." But I think that is missing the point.

I think there's an interesting distinction being drawn here between "faith" and "tenets." Both describe a belief, but faith is a motivating principles, not just an abstract proposition.

The point is not that beliefs don't matter at all, it's that they don't matter as abstract propositions on their own; they matter in relation to the experience of conversion that they are oriented towards.

If our beliefs are not oriented towards becoming redeemed and receiving the holy ghost, and then figuring out how to live in the world as converted people, they're just "tenets," not real saving faith.