We should be able to move certificates on and off it because they would most likely expire anyway. So, you can get the keys from the camera, what then? You use openssl to sign an image that shouldn't be signed... what then? You do this enough and get caught, you lose your cert and can never pass the kyc to get another one.
Then every picture you used it for in the past would start showing a big red exclamation point with a note, "This is a scumbag user known for forging images".