I completely agree with your assessment of the state of affairs. Being a casualty of it all, I just feel there is a bit of misdirected animosity in the discussion. BREXIT did not necessarily have to involve leaving EASA, Galileo and other EU agencies; Norway, Switzerland and others seem to be enjoying their Sovereignty just fine.
These ‘red lines’ seem well beyond anything the public had any direct say in from my perspective. It’s easy to vote on blanket statements printed on the side of a bus. I can only assume the fine print was posted on the underside of said vehicle...