Indicative in my dictionary doesn't mean definitive. It just makes it much more likely. You can make quality products while LLMs write >99% of the code. This has been possible for more than a year, so it's not a lack of updating of beliefs that is the issue. I've done so myself. Rather, 90% of above products are low quality, at a much higher rate than say, 2022, pre-GPT. As such, it's an indicator. That 10% exists, just like pearls can hide in a pile of shit.
As others have said the reason is time investment. You can takes 2 months to build something where the LLM codes 99%. Or you can take 2 hours. HN, and everywhere else, is flooded by the latter. That's why it's mostly crap. I did the former. And luckily it led to a good result. Not a coincidence.
This applies far beyond coding. It applies to _everything_ done with LLMs. You can use them to write a book in 2 hours. You can use them to write a book in 2 years.