^ They all do at some point.
In spite of the fact that I'd call myself as much of a car nut as anybody on this board, I barely ever watch car reality shows. And I've never seen Coddington's. A common thread of all these shows seems to be the fact that they are working with time constraints, for such and such show or what have you. Nobody would take the time to triple-check that everything they did was right, or always opt for the longer more precise way of doing things.
Here's one of my favorites of Boyd's...