What you're referring to is one of the AI systems that I mention that the top ~25% will still write code for directly. It's a governing AI system.
Most software development doesn't involve tasks that can very easily kill people with N thousand pounds of fast moving metal.
Most software development is trivial by comparison in terms of challenge/complexity. It'll be wiped out accordingly. Why would you need anything more than a human handler to sign off on AI development as it goes down a path? It'll be able to build drastically faster than a median developer can and it can do it without getting tired (its productivity won't implode after 4-6 hours). All you'll need are some human handlers to approve key decisions during the process of development (to ensure you get to the end product that is desired).
As with most technology job predictions, it won't happen the way most predict. Yes what defines a developer/swe will change, but our history has shown us that we are likely to see an increase of jobs in technology for the long term. I remain optimistic that most people will find new roles as they emerge.
This reminds me of self driving car predictions. It also ignores that "building" software encompasses many different tasks.