You're just assuming that one set of optimisations are the most important for everyone in UI design. Good UI design doesn't state that it is always the case tha

You're just assuming that one set of optimisations are the most important for everyone in UI design. Good UI design doesn't state that it is always the case that people should be able to use it intuitively. Sometimes enhanced performance, speed, and focus over the long term are optimised over intuitiveness. This is the case for Vim. There is room in the world for both sets of optimisations.