It is a curious thing when Mormons reject "the faith". They tend to reject all faith. Ardent love (faith, confidence, trust) becomes its opposite.
While one religion is not just as good as any other -- some are better, some are worse -- religion itself is a substitute for interaction with God. It occupies our time while we have nothing better to do. And what would be better?
To associate with God.
Pure religion is to do good -- to visit the widows and orphans in their affliction and to keep one's self unspotted from the world (as one who knew Christ put it). But religion is no substitute for knowing God. Eternal life comes by no other means. If we abide in religion, thinking it an adequate substitute for coming unto Christ, we fall short.
Both Mormons and Catholics are remiss when they conclude that rites, relics and religion save us. They miss the point. Even thinking one's good works "save" us is erroneous.
Christ gives salvation to those who seek Him out, find Him and ask for it.
I understand that nothing less (and nothing else) will do.