Yet nevertheless, both e.g. syntax highlighting and intellisense have been heralded as things that "fry ur brain". So have high level programming languages by the way.
To give you a particularly specific example, Rob Pike really wants you to know that if you use syntax highlighting, he thinks of you as a child.
And the human beings who use them to produce code don't produce deterministic results either. Current harnesses have come a long a way to make non determinism not be a problem for quite a few areas. And the scope keeps increasing every day.
AI is as deterministic as a human programmer. A programmer who is burned out and has not slept well produces code of a different quality than a programmer who has slept well and is highly motivated. That's hardly deterministic. AI can be made deterministic enough if you have strict quality gates, just like with humans.