I see this sentiment or implication that technical skills and people skills are somehow mutually exclusive often, even on here which is crazy. I think this stems from some broader trope that people are "balanced" like RPG characters or something, e.g. nerd vs. jock or artist vs. scientist, salesman vs. accountant, etc. The reality is that people who achieve in one area are more likely to achieve in others. If someone figured out how to be a good engineer, they can probably figure out how to be a good manager, too, if they wanted.