Yeah if you're an expert you can spot some of the bugs in AI-generated code as easily as you can spot the same bugs in the average developer's average code. Of course, there will be bugs you don't see, including all the extant bugs in your own handwritten code...
I think AI has a way of automating away the low quality code that the vast majority of our industry is built upon and churns out all the time. And the vast majority of code and codebases is just hmm someone pays us to make it, it doesn't have to be particularly stellar...? And that is what will stop being paid for.
Why should AI researchers like Karpathy care given they are not professional software engineers writing code for critical systems? (It is now even worse since they are investors)
I would not expect them to know any better, but the companies pushing “vibe coding” are the ones that should know better and how wreckless it is. (Because it is not software engineering)