I don't doubt you are correct! My issue with it it that it is bad design. It took them 1/2 hour to remove and replace the whole assembly; for another ten minutes, (what it took me) a simple gear costing a few pence could have been changed, saving about £150 in the process.
At the risk of sounding old, I don't believe that some modern engineering design is as good as it was. They are very good at using the latest techniques to manufacture, but nothing is designed to be fixed. The approach is, if they can't replace the entire assembly or plug a laptop in and re-programme it, then it's not cost-effective. As someone who has been in engineering for over 30 years, that makes me sad.
It'll get to the point where nothing is fixable, you'll just replace the item or even the car.
The other thing I want to get to the bottom of, is that I know there has been a recall on these mirrors, but I don't know the details. The technician who mentioned it to me when he first looked at the problem went off to speak to his manager, but came back and told me that "it wasn't this particular problem". I asked what the recall was, but he wouldn't tell me even when pressed - I got the impression he had been told not to say anything more, so I'm wondering whether this was actually the problem all along.
Alan