Sorry, I totally disagree. A proper 'Chinese Wall' means the flight crew have no medical information and the medical crew no met or other flight information. The moment the wall is breached the crew members behave to deal with information they shouldnt have, or worse still their uneducated perception of that information.
Scrambling to an IGTN is a failure of dispatch and the management's policies. same for a body. Totally agree you shouldnt waste resources on such requests, but that sort of decision shouldnt even get to the ready room.