The study doesn’t compare their findings to any other platform, so we can’t really tell if those numbers are good or bad. They just state the absolute numbers, without really going into to much detail about their searching process. So no, you can’t draw the conclusion that the Fediverse has a CSAM problem, at least not from this study.
Its not our responsibility. As long as moderators are reporting it as they come across it and the fbi is looking into it then what more can be done? Google, Twitter, discord, Instagram, reddit have 10000x the amount of csam.