That is what people said, and yet still repair techniques are devised. The cryptographic storage is not tamper proof and thus is all the more reason to repair a board at least well enough to recover your data.
Well obviously nothing is impossible, but this sorta work is about as close to literally rocket surgery as you can get. Software: difficult, hardware: difficult, thousands of dollars of specialist equipment, and the steady hands of a surgeon. There's a difference between possible and "possible".
also there's a difference between devising a technique for a model, and doing a repair on this specific device. To get to a working technique you probably need to brick a lot of machines.
