Firearm and ammunition manufacturers are already not culpable for people getting shot. Your argument would be better made comparing Comma 3X hardware + OpenPilot software to something that unintentionally causes injury despite being used as intended.
Then again, if you used that line of reasoning you'd have to show a comparable example of OpenPilot unintentionally causing injury, rather than just waving your hands and saying "it COULD happen, because unregulated!"
Come on, this line of reasoning pretty clearly can't work in a lawful society.
Imagine Smith & Wesson making the argument that clearly this gun is just meant for decoration, we can't be responsible for people buying bullets on our webpage and shooting people. That's clearly a bogus argument. It's legal obfuscation.
If comma didn't want people to run openpilot on their dashcam, they wouldn't host a guide, the wouldn't market it, they would lock down the software they build. The hardware is MADE to run openpilot. Openpilot is MADE to be run on the hardware.