>Every programmer can create the system from scratch

Are you sure about that? Can one coder recreate Facebook's(for example) complete architecture from scratch? Unless I misunderstood you, I'd imagine there is just too much domain specific knowledge in all the components to do so even in a single lifetime.

>The most incredible work happens in the first 3 months by a lone developer green-fielding with no boundaries.

The graveyard of github projects with the mentality of "I could recreate that in a weekend" seems to somewhat contradict this line of thinking.