According to your information, since there is no automatic system behind the post deletion, the moderators delete the posts manually, so my question is if someone reports against someone or a post, does the moderator not monitor the post and delete the post only based on the information of others? Do you? If moderators delete posts based on other people's reports without checking posts, it will be very harmful for every member.
If the moderators will delete any reported post without check it, this mean the post deleted automatically, not manually. Moderators will check the quality of the post, the board the post created etc, they only check the reported post, if there's a shitpost but no one report it, that's shitpost will not be deleted since the moderators didn't receive any report by other users.
You can try to report 10 high quality posts, let's see what the moderators will react your report, your 10 reports might marked as bad reports.