THat's just the thing, it depends on your perspective, where you're coming from. Viewing it from strictly one perspective is narrow and will probably not work very well, although there is the question of which has more pull - apparently there has been a few cases where the marriage was so strong that it pulled the other out.
If we want to dig a little deeper it kind of shows how shallow/deep the relationship may be in the first place, and membership in the same religion with reasonably attractive personal features is just not a good or very deep bond. Of course we've heard of the three cord thingy, the problem is people think religion is the same as a spiritual bond. Has anyone in the organization ever pointed this out? Or is it a matter of taking care of the "desires incidental to youth"? No? Maybe they don't even know what spirituality is in the first place.