To sum up my perspective: Does the phrase "Separate but equal" ring any bells here?
To be slightly less quippy: If there is no qualitative difference between two legal terms, there is no reason for them to remain separate institutions. They'd already be effectively identical so there's no reason to invent a separate term. The separation is merely pandering to a sense of elitism, and that's something that the law should never humor, much less pander to. If there is a qualitative difference[footnote]And in the States at least, there is quite the qualitative difference between Civil Unions and Marriage, with the latter granting hundreds of legal rights and benefits that are excluded from the former[/footnote], then it's not something we should respect as anything other than a stepping stone to merging the institutions more fully.
To be slightly less quippy: If there is no qualitative difference between two legal terms, there is no reason for them to remain separate institutions. They'd already be effectively identical so there's no reason to invent a separate term. The separation is merely pandering to a sense of elitism, and that's something that the law should never humor, much less pander to. If there is a qualitative difference[footnote]And in the States at least, there is quite the qualitative difference between Civil Unions and Marriage, with the latter granting hundreds of legal rights and benefits that are excluded from the former[/footnote], then it's not something we should respect as anything other than a stepping stone to merging the institutions more fully.