I would agree if the person was only working on the exact same project each time. However I would also find that hard to believe. I bet if we replaced career with team, we could then all agree its relevant.
I would agree that's relevant, it's true. Cold starting a career sounded like "I never coded before, let me try to jump in" or at the very least, "I never coded in X company before, let me try to jump in." His advice isn't bad, but for him personally, it's all been sheltered at Facebook, a well managed company, for more than a decade. Not exactly daring jumps into strange, new lands.