Based on timing and assumption that posters are Shomer Shabbos, notpashut is in Israel and jewishfeminist02 in either Europe or Israel. I am in middle of US.
The one area of halacha that carries the heaviest long tern responsibility is writing Gitten (Jewish bill of divorce).
Requiring every one going into business to have expertise in Choshen Mishpat (Yadin Yadin) is impractical.