Can we at least agree that applying this method to things (ie engineering) and to people (ie social media management) is very very different? You can stress things until they work, iterating a million times. Things are inanimate and they have no memory.
People, on the other hand, do. They see you treat them like guinea pigs and get offended/confused/mad.
I totally believe Elon thinks this method applies to everything, but it doesn't. You can't A/B test educating a child, for example.
If I make a mistake with a person that change things between us. At least I have to apologise, not all mistakes are irreversible of course. But some might benefit