It may be a 'marriage' as you like to define the word, but that doesn't magically make it so.
Shall we use 'marriage' to also cover the union of a man to a horse? man to a table? man to a child? They have civil rights too!
Shall we use 'marriage' to also cover the union of a man to a horse? man to a table? man to a child? They have civil rights too!
(In the same way, I'd even describe your reason as 'religious, just there are no gods and churches and other deities involved'. We are also used to call fanboy disputes between the text editors or operating systems as religious wars. And it's a very good description.)
I'd be happy calling my argument 'historical'. I don't like changing things that have served us well for centuries.