Apparently when retail investors win it's "Manipulative trading activity"... I'm so glad Bitcoin and DeFi was invented in my lifetime and I can be protected by maths and computer science instead of a three letter agency.
There isn't really such thing as decentralized. Its just the authority gets shifted around but the same issues can still show up.
The risk may not be in the same spots as traditional markets, but it's there. Return doesn't come without risk, it comes because of the risk.