Time to remember that marriage is about reproduction: it takes two of different kinds, one cannot viably/reliable do a good job of it alone, society should persuade the two to raise their offspring (not dumping them upon society at large), and that society at large should facilitate/encourage/enforce that union that the species may continue well.
People are free to pursue happiness as they see fit.
Quality procreation, being vital to society’s continuation, needs some legislative incentives.
That brings up another idea I had.
Is it time to outlaw natural sex based reproduction too? Nature was very discriminatory in this process, almost hateful.
If we outlawed natural sex based reproduction effectively (maybe an operation on females after birth) it would eliminate unwanted pregnancies and allow the government to regulate births based on social and scientific goals, and 'level the playing field' on diversity of the population.
just a thought.