I think you're mistaken as to the meaning of the word professionalism. What you cite is one possible meaning, but it isn't the one that's used here. The dominant meaning is closer to ethics: it's a matter of choices rather than capabilities. The difference between professionalism and ethics is that professionalism may mean to do the right thing by the employer, even if it is not the right thing by your personal moral compass (for example, it is generally unprofessional to disclose a defect in a product that you manufacture, or to complain about work conditions).
However, I agree that the tag is a red flag. Questions that have this tag are likely to be questions of ethics, which might be discussed constructively on Philosophy Stack Exchange, but definitely not here. Such questions are argumentative by definition, they can only be handled in a questions and answers format if the questions are asking for logical argumentation based on references, and not for generalizations based on personal preferences.