A couple of subjective thoughts - the only two points that don't jive for me are that spending huge amounts on a wedding significantly increase the likelihood of divorce, while having 200+ people at your wedding severely decreases it. It seems likely to me that the amount of people who attend the wedding is insignificant, but it can be a good indicator of the importance of close family and community of friends.

The only other thought is how church comes in to play. This is a touch of a sore spot, because my parents stayed in a bad marriage for probably a decade longer than necessary due to religious stigma. As it is, my mother still won't acknowledge her divorce to the church because she would be denied certain things that are important to her, personally.

So I'm not sure that religion makes a marriage stronger, it just places a higher degree of shame and stigma on divorce.

But again, these are just my personal observations, from someone happily married for a decade who has a big family, spent less than $10k on a wedding with less than 50 people, and is (and whose partner is) agnostic.