By vastly more complex problems, I think the parent is referring to engineering problems, not mathematical problems. And in this case quantity has a quality all

By vastly more complex problems, I think the parent is referring to engineering problems, not mathematical problems. And in this case quantity has a quality all its own. Yes, 1000 people in a bunker could in theory do the calculations necessary to refine airframes or planetary scale weather modeling, practically they would be impossible economically and would never be solved