It's good advice if you are more of a MAKER (developer/engineer/inventor) and less of a MANAGER or LEADER (being a "software architect", "lead developer", or ev

It's good advice if you are more of a MAKER (developer/engineer/inventor) and less of a MANAGER or LEADER (being a "software architect", "lead developer", or even just having a very complicated personal life that involves taking care of other people and solving other non-autonomous people's problems - like just having a bunch of needy kids - can turn you from a MAKER to a MANAGER even if your "job" is just to brilliantly code stuff up) I think there's a metric, some kind of sweetspot for (brain capacity e.g. working memory times "power to focus" times mental stability)/(things to manage times how unpredictable and risky the managed things can be), after which you need to use external "crutches for your mind" ...but it's entirely your choice if you choose to live in the zone where you can do everything with your mind or you need to expand beyond it (or you might just have a very chaotic mind to begin with and need the crutches for everything).