You have to be responsive to elected officials, you have to know how to navigate through assemblies, and you have to face the voters and deal with popular protests and petitions, not to mention the pressure from media commentators. Even if you have some area of expertise, if you do not get support from your superiors, subordinates, elected officials, and commentators, it is difficult to bring your talents to bear.
而公務體系是團隊工作，涉及代議政治、議會生態、直接民主，常有人民來抗爭、訴願，再加上輿論壓力，即使學有專長，如果得不到長官、部屬、議會、輿論的支持，也很難發揮。