The problem with the black box approach is not only does it mess with right to repair, competition, and home build jobs, but even people who make cars! I've literally been to talks in car manufacturing events where a speaker from a large car manufacturing give talks about how hard it is making life for them. Does that car manufacturer do anything different? Nope. Whole culture is infected with "my secrets" thinking which makes everyone's life hard. Things are at a complexity now, everything should be built to be debugged.