The central claim here is illogical.
The way I see it, if you believe that AGI is imminent, and if your personal efforts are not entirely crucial to bringing AGI about (just about all engineers are in this category), and if you believe that AGI will obviate most forms of computer-related work, your best move is to do whatever is most profitable in the near-term.
If you make $500k/year, and Meta is offering you $10M/year, then you ought to take the new job. Hoard money, true believer. Then, when AGI hits, you'll be in a better personal position.
Essentially, the author's core assumption is that working for a lower salary at a company that may develop AGI is preferable to working for a much higher salary at a company that may develop AGI. I don't see how that makes any sense.