Well. It's not a counter-argument to anything, it's an illustration of how we end up with bad codebases, and why specifically in big enterprises. The incentives are set up exactly in the way that lead to it, particularly by making it expensive to clean up tech debt.
Fair enough if that was the point you wanted to make, though in that case I'd argue that the kind of disaster scenario you described isn't specific to big enterprises but to disastrously bad software development organisations. A lot of small organisations think they're operating at enterprise scale and make the same kinds of mistakes!
