It is not that it is impossible to come from nothing, but it is likely getting increasingly hard
When you start from nothing you live a lot on faith. A lot of things don't come on time for you. Even getting married and having kids become impossible and misery if you do it. It would be like one goal post to next type of dragging life. And only thing that can handle this is money, not people, not support of anything, just pure raw hard numbers, it's like money domination can make such problem go away to 90 or so percent.
The challenge isn't in the getting married part - my wife and I eloped :D Having kids though is a bit different. One thing that seems quite common however is, when people have kids, they start to work harder for them.