The issue is that we assume that there was a building somewhere, where a group of people sat down and designed and produced a device. (the soap dispenser) But w

The issue is that we assume that there was a building somewhere, where a group of people sat down and designed and produced a device. (the soap dispenser) But we don't actually know that. If there is a single spot where this was done, and also where the testing was done, and there was an abundance of skin tones available, then this was caught. But that's a lot of ifs. It could be that the device as designed and completed for manufacturing 15 years ago, the manufacturing was shifted around between 2 companies and the supply chain has 10 levels deep of participants that all did their own tests on their part in their own company in their own country on their own continent. And between that and the consumer it turned out there were 4 companies that just trade and don't actually look at, touch or use the product. This is probably not what happened at Nikon, I'd guess that they have a few departments that may not work together as well as they could. Would be interesting to see how this actually came to be, I imagine there are many ways to create a (partially (bad)) product, and equally many ways to try to prevent that.