I once asked manager 1 at company 1 about manager 2 at company 2, who had worked for manager 1 at company 3. Manager 1 said "manager 2 is a good engineer, but a poor manager of engineers".
I didn't think much more on this topic until recently, when I wondered "Wait, manager 2 is managing a team of engineers at a VLSI engineering driven company. How can it be that he is a poor manager of engineers?"
And then I realized: at companies like Intel, most VLSI engineers' first experience of management and team leadership is (or at least was, until recently) NOT managing other engineers. It is managing technicians, specifically a team of layout, physical design, specialists. Amazing as it sounds, 20 years after silicon compilers, Intel still largely accomplished chip layout by hand.
I posit that managing a team of mask designers is different from managing a team of design engineers. In the former the tasks are supposedly known: convert schematics into layout. In the latter, there is more backing up and retrying, more experimentation. More and more so as the level of abstraction rises, through microarchitecture and architecture.