When Discord fails the bad actors control the flow of information and have complete control over the server.

When someone steals your Hive account they only have access to your account and not the whole operation.

If, for example, GU had their communication channels set up on a decentralized platform others could raise the alarm because they couldn't be silenced. When everything is on Discord you can control who says what and ban anyone who is trying to prevent people from falling for the scam.

To very different scenarios imo