I assumed that moderators just ban people they do not like or at least remove comments. Blocking people that you do not like is helpful. Keeps your feed and comments section clean and brings less unfriendly behavior. I’m a huge fan of Lemmy’s blocking, it does not prevent the blocked person to comment but it does help the blocker to prevent seeing anything from the blocked person. Brings peace to both, one can simply comment and the other will not see it.