I agree with the author’s take for the most part. That said, the best line managers I’ve had have done some IC work in the past of the same nature. The best PMs

I agree with the author’s take for the most part. That said, the best line managers I’ve had have done some IC work in the past of the same nature. The best PMs I’ve worked with vigorously attack the customer facing aspects of the problem and trust their technical reports completely on the implementation details, including pushback when the ICs see problems in the product scope.