They have a "Shop" button on their homepage that lets anyone buy their product for installation on their own car. I had a coworker purchase Comma.ai + a specific make/model solely for its Comma.ai compatibility last year. Average people are getting in on this, for the better or (likely) worse.
Reminds me of the book "The E-Myth: Why Most Small Businesses Don't Work".
Just because you are a good engineer, does not mean you are a good entrepreneur. Most engineers think it's just about building a good product. This is not true.