It was written by a major trying to convince both those in charge of military doctrine (army leadership) and military budget (civilian leadership). Both of which can be obstinate and counterproductive. Army brass sometimes prioritize their careers over everything else. Civilian leadership sometimes prioritize their careers over everything else.
Yes. I agree, although careerism in the military is maybe not that strong an influence; it is, for sure, but not that strong yet. Careerism in the political class is probably exactly as strong as you claim it is. However, I do hope there are sensible people within that group too, and they heed the underlying message.
The military is still fairly results focused compared to the political class so that at least sort of pushes back on the most flagrant careerism.
How can you make this comment when the US military has literally created an entire industry that has served no single purpose outside of flagrant careerism? Like the military industry complex is a real thing and is almost 100 years old at this point, all it's done is make the world drastically unsafe while doing an immense amount of harm across the planet.