For Mandela's memorial service, they hired a sign language interpreter who just made whatever gestures he felt would look convincing-enough to pass.
Nobody bothered verrifying if there was an audience for that, what sign language ( there are dozens ) audience would be large enough to warrant an interpreter, and if he could competently use that sign language.
Because it was virtue-signaling, and the opportunity to hire another person to fill a useless position.
Just empty virtue signaling, as always
For Mandela's memorial service, they hired a sign language interpreter who just made whatever gestures he felt would look convincing-enough to pass.
Nobody bothered verrifying if there was an audience for that, what sign language ( there are dozens ) audience would be large enough to warrant an interpreter, and if he could competently use that sign language.
Because it was virtue-signaling, and the opportunity to hire another person to fill a useless position.