I think you and the author are arguing the same point. The middle class offer developer that’s unskilled is going to be on the chopping block. Let’s say that there’s a robot that can now be a sous chef. If you have a good sous chef, you might keep that person. If the sous chef poorly executed her role, the new robot sous chef is probably looking pretty good. Fundamentally this is an hollowing out of the middle class. Arguably these people should not have had a job, but they provided just enough benefit that they weren’t fired.
In my analogy, it's not because they are "unskilled" or "bad". But they become obsolete because the shareholders want the singular master chef and their army of robots doing all the cooking.
And it's not just because the agents execute faster than humans, it's primarily that they have lower friction to onboard and off board. In the past we needed a "standing army" (salaried, full time work). Again this is not about the soldiers in the army being bad of incompetent, those are excuses. The real reason is that it takes a lot to train and maintain a soldier. Bu t when we now have ephemeral agents which spin up and down as needed, then there is going to be a strong incentive to cut down on the salaried middle class.
Simultaenously platforms like Mercor which offer white collar task based gig work are on the rise.
The logic is that ordinary humans are becoming too expensive to maintain on a standing basis.
The reality using this metaphor is that you have good sous chefs who are being fired anyway because management thinks the rockstar can just get more done with the robot chef. This distinction into "the sous chef got fired because they were bad" is a distraction from the reality at hand in that the people being cut out are all across the spectrum. There are new engineers who dipped their toe in the water and got cut. There are domain experts of 30 years that architected core systems the company relies on that is cut.
Nevermind the aspect that thses sous chefs could one day be rockstars, because no rockstar came straight out of college outperforming their senior's skills decades prior. You're hollowing out whatever isn't profitable at the cost of future talent (and likely the future of the company), but those holding the money don't care. They'll move on the the next company to suck dry.