This is false, even more so for most Tesla models. Cars have a distributed E/E architecture where embedded software runs on several computers (called ECUs that range from anywhere between 10 and 100+). Most newer Tesla models are ahead of the curve and have a more centralized (zonal) E/E architecture with very few number of ECUs.
In summary, the infotainment system and the drivetrain definitely speak to each other and unless a secure architecture comes along, I would not discount the possibility of unintended interactions due to bugs. In fact, most famous car hacks start from the infotainment system and make their way into the drivetrain.
In summary, the infotainment system and the drivetrain definitely speak to each other and unless a secure architecture comes along, I would not discount the possibility of unintended interactions due to bugs. In fact, most famous car hacks start from the infotainment system and make their way into the drivetrain.