Like anything else, its a non issue for people who it doesnt effect.

Scenario: Alan and George have lived together in their mansion in Double Bay for thirty years. George dies.

Alan is beside himself, meanwhile, George's siblings, who disowned George years ago because he is gay, decide they want the property. They take Alan to court, argue that he was only a tenant and no longer has rights to the property. the judge who is homophobic agrees, house goes to George's homophobic siblings.

Thats why gay people want marriage, not because theyre all starry eyed, particularly, but because they want to make a legal commitrment to each other, and look after each other the way other people do. in Insurance, property, and other similar areas.