I totally agree.
Licenses/certifications do exist. SBF had the FINRA Series 7 and 55.
https://brokercheck.finra.org/individual/summary/6204362
The loophole is that employees at hedge funds and investment advisers don't face the same licensing requirements as employees at banks and brokerages who deal directly with customers. There are people who trade billions of dollars of customer funds a week without any required regulatory exam or license.