Johnny Depp in Fraternity Initiation

In this clip from 21 Jump Street, Johnny Depp is a pledge in a fraternity. The pledge father explains the hardships that will befall the pledges as they attempt to become active brothers.

The pledges arent allowed any form of individuality and are demeaned as they complete insensible tasks. What is effort justification? How does effort justification make the pledges feel hazing is worth it to become a brother? Why would the pledges wish to become a part of such a group?