I'd argue that a closer analogy is I bought a laser based measuring device. I point it a distant point and it tells me the distance from the tip of the device to that point. Many people are excited that this tool will replace rulers and measuring tapes because of the ease of use.

However this laser measuring tool is accurate within a range. There's a lot of factors that affect it's accuracy like time of day, how you hold it, the material you point it at, etc. Sometimes these accuracy errors are minimal, sometimes they are pretty big. You end up getting a lot of measurements that seem "close enough". but you still need to ask if each one is correct. "Measure Twice, Cut Once" begins to require one measurement with the laser tool and once with the conventional tool when accuracy matters.

One could have a convoluted analogy where the carpenter has an electric hammer that for some reason has a rounded head that does cause some number of nails to not go in cleanly, but I like my analogy better :)