And/or maybe the vendors were annoyed that people would lend the keys anyway, refusing to accept that it is normal because that's how delegation of authority works in real life too. House keys are also things you often lend to a third party that you want/need to access your house in your absence, and in fact making extra duplicated for trusted third parties is normal.

Software vendors continue to refuse to support, or even accept the existence of, this entire class of use cases for regular consumers (they are, however, more than happy to milk enterprises on convoluted implementations of those).