I dig what you’re getting at, but there are many excellent machine-built wheelsets; certainly the vast majority on the road are, anyway, so when you think of all the people you know and ride with and how many have had to retension or had other wheel problems, I bet it’s close to zero, challenging us to rexamine machine-built prejudices.

The hand-built vs. machine-built paradigm is old, from decades ago, and improvements in materials, technology, and processes have rendered it virtually meaningless. It’s easier to make excellent wheels today, whether by hand or machine, though I think major manufacturers do both, i.e some machine assembly and some steps/checks manually.

It’s probably most insightful to phrase any axiom around quality, e.g. “low quality wheels are prone to problems and may need service like re-tensioning.”