Most of my working life was spent in the nuclear power industry (operations and maintenance). You cannot imagine the stringency of the QA requirements at a nuclear plant - makes NASA look like rank amateurs. Besides step drills, some common hand tools such as crescent wrenches and Leathermen were usually prohibited anywhere on the site. Violation meant termination.
so tolerances is the issue where you were. I'm sure a soap dispenser doesn't quite demand the same tolerances say a seam on a storage cask might.
Although from the looks of it, maybe at Fukishima (sp?) the soap dispensers are better built.
Nuclear power is one area I'm glad regulations are anal. Buddy did some maint work at one. He mentioned one thing they told him was that to never use the door handles. just push the doors. turning the handles set off the alarms.