What this shows us is that ChatGPT is on the scale. It's a 1 or a 2 - good enough to pass a junior coding interview. Okay, you're right, that doesn't make it a 10, and it can't really replace a junior dev (right now) - but this is a substantial improvement from where things were a year ago. LLM coding can keep getting better in a way that humans alone can't. Where will it be next year? With GPT-4? In a decade? In two?
I think the writing is on the wall. It would not surprise me if systems like this were good enough to replace junior engineers within 10 years.