They're incredibly important, and no one involved in the leak has tried to argue that it was a GOOD thing. The problem is that no one knew they were doing anything that risked a suspension by being present in a chat where a leak was posted. They've been suspended for not immediately running to report it to WotC. When Kozilek hit the web, there was all sorts of speculation that it was just a fake. It easily could have been. Excellent fakes have happened before.
Also keep in mind, we're not discussing the big Oath spoiler with all the mythics and expeditions. This group had nothing to do with that. WotC's response appears to be punishing the SE chat channel for the earlier leak while blaming the later one on the same crowd. They've heavily implied without outright claiming that the group has been responsible for every leak over the last year or two (I can't even remember the others, if there were any). That didn't happen, but WotC is trying very hard to give that impression.
Suspending the two people responsible makes sense. They know they goofed. It's going to cost them their favorite hobby and their certification, and at least Mississippi and Alabama are going to really suffer in terms of organized events until new judges can find a way to cover those events. What's completely out of left field is punishing all of the regional leadership who never did anything wrong. A simple email or phone call to our RC saying "hey if this happens again, you need to tell us" would have been sufficient to ensure they get all the support and communication they need. After all, that's HOW they caught the leakers! There was an RC conference *last week* with WotC reps present. It could have been handled in person in less than thirty seconds.