One reason why people (in some African countries) never buy into divorce could be its prevalent religion. Lets not forget to add that most families frown at the idea of divorce. They prefer spouses to endure whatsoever they are dealing with in their marriage rather than quitting it.
It is worthy to mention that at exchange of wedding vows, there's a line that goes "for better and for worse". In other words, one promise to stick with their spouses regardless.
Again shouldn't there be a deal breaker?