The engine behind moore's law is that for the same given silicon area, we can pack more and more transistors. So what, one might say? Because if we can cram more and more die on a wafer (which has remained a standard 300mm diameter since 2000's) then the $/die goes down. Running a semiconductor fab is about how many wafers can be processed per unit time (or also known as WS/W or wafer starts per week). I see problems with this analogy but that's fine, its an analogy after all :)

"If the automobile had followed the same development as the computer, we would produce a billion rolls royces a year, get a million miles per gallon, can transport 10000 people per car and explode once a year, killing everyone inside. Oh and it would cost $3.50 per car."