Those companies worth billions like GM and Tesla perform extensive testing to prove to regulators their software isn't going to kill people and does not pose an unacceptable risk to other drivers on the road. Do you get to sidestep all that if you post your code to GitHub?

Why not? You are free to modify your vehicle in almost anyway you want as a consumer. Should someone putting some rain shields on their window require licensing and government testing for it because it might break off? Should generic brake pads or tierod ends require independent government testing or approval to be purchased and used?

Regulations don't exist to save people from their own stupid mistakes, they exist to prevent systemic abuses and dangers to the public in the pursuit of profit. And we already know from endless examples that corporations will knowingly let people die if their decision will increase profit margins. Not to mention the public doesn't have the ability to properly test or verify corporate designed and sold devices. Unless corporations provide all documentation related to the design and materials and code used, they should have special restrictions and regulations beyond what the average person does.

Yup, because you get to be personally responsible for any outcomes just like you would be if you were driving without ai assistance. If you aren’t comfortable building and testing an open source project then it isn’t for you.

There have been dozens of fatalities due to Tesla self driving tech. As far as I know there haven't been any fatalities due to Comma tech.

Imagine if they all worked together on an open source project together.