This emphasizes differences in recruiting and advancement between career tracks, but human resources is more like accounting or legal in that basic compliance is essential and varies more by locality than profession. That is, there are laws and standards which vary by locality regarding how employees are paid, how benefits are given, and how conflicts are handled. While there is some variance depending on profession, most of this is both general and essential.
It is certainly true that attracting and cultivating talent are important and specific to career tracks, but maybe that is more of an argument that teams need to handle that apart from the basic compliance assurance role that human resources often handles.