Why Would You Want the Band at Your Wedding to Play Converge’s “Concubine”?

Is there anything about Converge’s “Concubine” to suggest that it’s presenting a positive outlook of a romantic relationship? The title of the song, the tone of the song, the video for the song, and what I have been led to believe are the lyrics to the song* all suggest that no, no this song is certainly not  presenting a positive outlook of a romantic relationship.

Dear, I’ll stay gold just to keep these pasts at bay
To keep the loneliest of nights from claiming you
and to keep these longest of days from waking you
For I felt the greatest of winters coming
and I saw you as seasons shifting from blue to grey
That’s where the coldest of these days await me
and distance lays her heavy head beside me
There I’ll stay gold, forever gold

And yet, this band, Kallaqri, did, indeed, perform the song at a wedding reception. It’s not clear if the bride and groom requested this song, which would be odd, or if the band just played it because they wanted to, which would be kinda fucked up. But as Metal Injection points out, “everyone [at the wedding] was really into it,” so whatever, I guess. Maybe they played Pig Destroyer’s “Trojan Whore” later in their set.

*I say “what I have been led to believe are the lyrics” because even reading along with the lyrics, I can’t make heads or tails of what Jacob Bannon is screaming. He could very well be saying “Fish tastes odd/Trust me God” and I would not know the difference.