Do you think that all managers and tech leads atrophy because they don’t spend all day “doing”? I think a good number of them become more effective because they delegate the simple parts of their work that don’t require deep thought, leaving them to continue to think hard about the thorniest areas of what they’re working on.

Or perhaps you’re asking how people will become good at delegation without doing? I don’t know — have you been “doing” multiple years of assembly? If not, how are you any good at Python (or whatever language you currently use?). Probably you’d say you don’t need to think about assembly because it has been abstracted away from you. I think AI operates similarly by changing the level of abstraction you can think at.