The whole raison d'etre of hyperliquid and defi in general is getting around "kyc or something". More realistic risk is poor opsec allowing govs to persecute people who use/host the service.
Also the XYZ markets that the stock tokens "live on" is not managed by HyperLiquid as far as I know.
Running a node for HL takes a lot of resources too.
But yeah they are non-custodial which is great.