This is surely right. You wouldn’t use “necessarily” here to mean, like, “justifiably”. It means that it is a direct consequence of “moving too fast and cutting

This is surely right. You wouldn’t use “necessarily” here to mean, like, “justifiably”. It means that it is a direct consequence of “moving too fast and cutting too many corners”, as opposed to an orthogonal safety lapse that can be shored up without changing the underlying circumstances. Inexorably. Not to say the article is correct about this, of course.