The fundamentalist Mormons in BC don't accept it either. As a liberal, I think two or more adults should be allowed to marry if they want to. Why should the state interfere in that? Any more than it should interfere if two gay people want to get married. In the USA, interracial marriage was illegal in many states till 1967. Same principle.

When I lived in Brazil, divorce was extremely hard. The state used the Catholic definition of marriage. I know the (Catholic) Philippines had (or maybe has) the same problem. Which led to many men abandoning their wives, but still being legally married to them.