> We could make an analogy to construction
To borrow your analogy:
A construction company that builds single level family homes can't build high rises. No matter how good the architect is.
Top developers can conceptualise and build products that 100 average developers couldn't achieve. Not to mention the large reverse economies of scale.
Case in point: I can get 1000 low skill Vietnamese developers for the same cost as 50 senior Valley developers. And yet for 90% of the work we do I'm better off with the 50 Valley developers.