As kids, we all grow up watching marriages all around us in series, films, other media and in reality. We watch a beautiful, traditional ceremony where a couple of humans experience what many (who has experienced it) would consider their greatest moments in their lives and we think, "One day I will be up there at the altar with my future partner and have the time of my life."
To deny anyone to experience that dream come true is plain, inhumane cruelty.