Reading code carefully is harder than writing code unless the code is written consistently and clearly in a way that is idiomatic to the reader. And there's way more code to review now, but companies aren't scaling up the number of skilled engineers on staff. So in practice, never reading all of the diffs is the MO that will be built into code we depend on.
Quite a few capable engineers really are that short-sighted!
The bigger question for the AI-techbro questioning "If AI writes your code, why use Python?" is "If AI writes your code, what use do we have for you?"
After all, there's dozens of people in the same business that have better domain knowledge but are unable to program - as a programmer the only value you added over random analysts and clerks was that you could automate shit.
Now you can't, so good luck competing with people who were already making half your salary when your largest value-prop is now gone.