I think it's like fixing your car

You buy a car for $30,000 but if it breaks, by the time you buy each separate part and have it installed at umpteen dollars per hour, a replacement car built that way would be about $100,000!

I remember paying for a Volvo water pump that I figured had to be hand-built by the Elves in their caves and hand-rowed from Sweden and hand-carried cross country to Eugene.