No, I am suggesting that the legal and religious concepts are different enough that they deserve different terms.
The sacrament of marriage reflects divine approval for the state, and that chaste behavior can morally include sexual congress within marriage, without damage to one’s soul.
The government is more concerned with inheritance, and taxes. Child support, visitation, and custody are government legal concerns not dependent on marriage or civil union.
By that logic Christmas should only be called Xmas or “winter holiday” by the government or secular people. But it’s all just semantics, as silly as when politically correct people try to change long-accepted terms to words they “like” better. A campaign to replace words is not a worthwhile effort.