I think "engineer" as a protected title refers more to their status as a professional in the strict sense of the word. If you are a professional, the norms of

I think "engineer" as a protected title refers more to their status as a professional in the strict sense of the word. If you are a professional, the norms of your profession override your loyalty to your employer. Your boss cannot override your professional judgment, unless they are also a member of the same profession and willing to assume responsibility. And if something goes wrong, it can be the professional who will be held liable rather than the boss.