No. It's completely unethical. Victims should not be used to promote the story of the person who has wronged them. Their voices should be used to tell their own experiences, not the perpetrator's version.
Toge Inumaki is important too. His special cursed speech ability makes him stand out. Also, the principal of the school, Masamichi Yaga, is likely to be important as he is in a position of authority and has an influence on Gojo and the other students. There could be other characters like the members of different clans that also play roles in the complex web of the story.
Gomi Gojo's Territory Opening Gesture was an important element in the " Return of Curse ". Gotto Gojo's domain was displayed as 'Boundless Empty'. This gesture was to pull the enemy into the infinite inner side, forcing the enemy's brain to produce a large amount of information, causing the brain to lose its function and could only stand and wait for death. Although there was no specific description of the hand gesture, it could be speculated that the hand gesture was to expand the domain through a specific posture of the hands.
It could mean that the person forces those he has victimized to repeat or spread his own account, perhaps to manipulate the narrative or gain some form of power or control. For example, a bully might make a person they've harassed tell others a story that makes the bully look good.