I don't believe religion taints of devalues marriage. I'm trying to understand, based on the comments, it seems like they are only still married because of their religious beliefs. This sounds like they do not love who they are married to which to me is wrong.
I'm trying to understand why they say that they continue to be married because of their religious beliefs.
Plenty of religious people, and plenty of non-religious people, stay married for life.
But I have literally never heard someone say they strive to stay married because of religion.
Not either of the posters you've replied to, but I don't believe either of them said that they're only in the marriage for religious reasons. They want to abide by the restrictions their religious beliefs places on them. They may be lucky that their marriage is working out, and that they've been able to work through the problems they've encountered. Maybe someone without their religious beliefs might have thrown in the towel earlier, but they personally don't think that's the way to go. But who knows, maybe someday they will hit an impasse and decide their personal happiness is more important than their religious beliefs. But for _now_, they are happy and stable enough that their religious beliefs help (as another poster suggested) to anchor them.
Full disclosure: I'm an atheist who thinks staying in relationships solely for religious regions is sad and a waste. I just believe you're misinterpreting their statements.
I'm trying to understand why they say that they continue to be married because of their religious beliefs.
Plenty of religious people, and plenty of non-religious people, stay married for life.
But I have literally never heard someone say they strive to stay married because of religion.