The keys are the drivers, and they are given to you. Also, you know in advance that you will not get specs.
Car companies also do not disclose the proprietary technologies they develop for their cars. The car you drive has closed, proprietary tech in it. You still drive it, don't you? Your own argument works against you, because you have a very wrong idea about what your rights are. You have the right to *request* specs, but they have the right to deny that request.
Also, don't forget that unlike car manufacturers, NVidia does not actively hinder other people from manufacturing custom keys (Nouveau).

