Eventually people want to have children and as much as society tries to convince us that single parenthood and out of wedlock children are cool, observations tell otherwise. Girls see their single mom friends struggling to make ends meet and don't envy them. Men see their single dad friends paying child support to kids they barely known and don't want that either.
Thousands of years of parenting have taught us that the ONLY arrangement that works to raise kids is a man and woman, married each other, remaining married to each other, and conceiving children between only the two of them which they raise together with shared resources.
Everything else is a lie and a recipe for dysfunction and poverty. And everyone in their hearts know this.
People are holding off getting married because they erroneously believe they can't afford to have children. This is a lie too.
Heck now you can just use a turkey baster for that. All the gays are having their "Gaybies."