You mean what if tech is forever? It's not forever. We thought it would be forever in '99 and it collapsed. The truth is, we don't know what the future will be like, but we can be almost certain that it will include children because there will always be some people who want children. So dismantling the support system for them (or letting it die slowly) is just asking for trouble, and is short sighted. Besides, you're underestimating the value of the children's economy. From birth to move out (let's say 18), many industries serve children, including quite a few that are startups.