I don’t disagree with you. There should be a level of inspection possible by an owner on the functions and processes running, especially if they will be held liable for any outcomes from operating failures that cannot be attributed to the driver.

In other words, if my insurance covers an accident but I can be sued in civil court for additional damages then I should be able to update/fix/review everything in it given that all liability is transferred to me upon sale. If I cannot answer to something because it’s deemed “proprietary” and “property” of the manufacturer, then they should not be allowed to transfer that liability to me.