I think you've hit the nail on the head. I've seen this behavior from others in the space before too, it's not a one-off. They refuse to use LLMs themselves, and state as much publicly "I simply don't need to resort to using the slop machine, my skills are superior", yet FUME when others they deem as "lesser" are able to use it to achieve the same results as them, oftentimes faster.
I can guarantee this post would not have been made had he not been the one to find that vuln first.
That's not the fault of the model, though. Even knowledgeable people that found everything manually can (ir)responsibly disclose it to the vendor for a payout.
Just look at the iOS jailbreaking scene and how Apple repeatedly poached all the devs until there was no one left, killing it off well before LLMs.
I can guarantee this post would not have been made had he not been the one to find that vuln first.