I see 2 parts that contribute:

1. Failed expectations - hackers tend to dream big and they felt like we're that close to AGI. Then they faced the reality of a "dumb" (yet very advanced) auto-complete. It's very good, but not as good as they wanted it.

2. Too much posts all over the internet from people who has zero idea about how LLMs work and their actual pros/cons and limitations. Those posts cause natural compensating force.

I don't see a fear of losing job as a serious tendency (only in junior developers and wannabes).

It's the opposite - senior devs secretly waited for something that would off load a big part of the stress and dumb work of their shoulders, but it happened only occasionally and in a limited form (see point 1 above)