Hated on ECM data until it saved my bacon on a tough job

I always thought real mechanics figured things out by feel and sound, not by staring at a screen. Engine computers seemed like a way for manufacturers to make things harder. Then I had this pickup in the shop with a rough idle. I was convinced it was a fuel delivery issue based on the sputter. Checked the pump, the lines, the filter, everything looked good. I was about to tear into the injectors when my buddy said to just scan it first. The code came back for a bad camshaft position sensor. Swapped it out, and the truck ran smooth. Now I scan before I touch anything. It cuts out so much wasted time.