It would also explain the silence - the project is over, the team is probably bound to secrecy because this stuff is classified.
The only time Satoshi spoke out (edit: and we don't even know that it was authentic, see discussion below) was to help the poor bloke who was mistaken to be Satoshi and his life was being ruined, and that was probably a collective decision by the former team members, it was the right thing to do.
This is a different case - Satoshi speaking out wouldn't help in this case, Craig sounds like someone in need of help from a professional psychiatrist or psychologist, http://www.drcraigwright.net/ almost sounds like a suicide note. I feel sorry and worried for the bloke.