Starting from scratch as they are, they could have marriages free of obligations to the state, based entirely upon love, and relying for success only upon the strength, talents, and commitment of the participants. Instead, they're struggling to enter the same trap that other married couples occupy. The sad fact is that these homosexual people, like most other people today, believe that a marriage isn't real unless it is licensed by the government. This attitude is probably caused by government and is certainly encouraged by it. Actually, there's more than one source of legitimacy.
Marriage can be a contract executed between the participants.
A contractual marriage is entirely as valid as a marriage licensed by the government. Indeed, marriage by mutual agreement predates the present government by a good many centuries. Marriage can also be a Holy Sacrament, executed before God. A marriage that has the sanction of God certainly doesn't need the recognition of mere government. Also, as with contractual marriage, religious marriage predates the present government.