Considering that these CEOs are talking about replacing all skilled and unskilled labor under them with LLMs, I don't see why they can't be replaced too. In reality, LLMs are overhyped. Even Grok says it straight - LLMs are probability models with condensed human knowledge that decides what the next word/letter should be. Original thoughts isn't its forte.
(Surprisingly though, that's enough for them to recognize that you're a human. Their models can identify your complex thought progression in your prompts - no matter how robotic your language is.)
The REAL problem here is the hideous narrative some of these CEOs spin. They swing the LLMs around to convince everyone that they are replaceable, thereby crashing the value of the job market and increasing their own profits. At the same time, they project themselves as some sort of super-intelligent divine beings with special abilities without which the world will not progress, while in reality they maintain an exclusive club of wealthy connections that they guard jealously by ruining the opportunities for the others (the proverbial 'burning the ladder behind them'.) They use their PR resources to paint a larger-than-life image that hides the extreme destruction they leave behind in the pursuit of wealth - like hiding a hideous odor with bucketfuls of perfume. These two problems are the two sides of a coin that expose their duplicity and deception.
PS: I have to say that this doesn't apply to all CEOs. There are plenty of skilled CEOs, especially founders, who play a huge role in setting the company up. Here I'm talking about the stereotypical cosmopolitan bunch that comes to our mind when we hear that word. The ones who have no qualms in destroying the world for their enjoyment and look down upon normal people as if you're just fodder for them.