That sounds a lot like "If you aren't doing anything wrong, you don't have anything to hide."
If you share information with each other, which is pretty much the entire point of communications software, you share it with Discord. A company that only allows you to share that information through them, and has limited financial and legal safeguards in place to control this information.
Personally, idgaf what discord does with my raid rants, but I don't see a point in leaving my car doors unlocked if I don't have to.