Earlier quoted context omitted.
Seems unwise to reason backwards from your desired conclusion (commons implies censorship/regulation, so it can't be a commons). Security is indeed a commons because the overall security of the ecosystem only benefits each person weakly, and so every actor rationally benefits by neglecting security. External regulation isn't the only way to address commons problems. Manufacturers can see the writing on the wall and w…
I imagine that it can also get better once a company can gain competitive advantage by advertising that "our device is secure!" But I suppose a precondition for this is customer awareness of the issue, which probably requires some well publicized high impact/casualty incidents first? :/
I'd say it absolutely requires a high-impact case, something like downing of an airplane, or a cyberattack that sets half of the city in flames. Otherwise, any concern of people about security will quickly get papered over by marketing - as it always is.