Both of y'all confusing individual with corporate.
The mechanic writes a blog post about how the locks on [a car model] don't work, and how anyone could just steal [cars], but doesn't tell the [car company] because, after all, the [company] wasn't paying him to.
Especially, when the car company spends on 'certifications' (security audits, in this case) and specifically markets it as a differentiator. That said, uncoordinated public disclosures in cybersecurity are bad form, given the well-established existing norms & culture; but at least, let's get analogies right.