Defcon stopped caring about privacy, hacker ethos, and digital sovereignty a long time ago.
Go there if you want to talk to their military recruiters or buy/sell proprietary snake oil security SaaS. It is really just another corpocon at this point. Hackers should probably skip it unless using it as a chance to hang out with friends in vegas on their corporate credit card.
The hackers are mostly at HOPE and CCC these days.