Yes yes, I'm on your side here. The point is that if the decryption module were open-source, it would be trivial to do it, and there would be lots of implement

Yes yes, I'm on your side here. The point is that if the decryption module were open-source, it would be trivial to do it, and there would be lots of implementations of it, while if it were a binary blob, it would significantly raise the bar. They know this, so they'll never agree to having it be open-source.