Earlier quoted context omitted.
The fundamental difference between asking on SO and asking an LLM is that SO is a public forum, and an LLM will be communicated with in private. This has a lot of implications, most of which surround the ability for people to review and correct bad information.
Surely the fundamental difference is one asks actual humans who know what's right vs statistical models that are right by accident.
In the time it takes to properly format and ask a question on Stack Overflow, an engineer can iterate through multiple bad LLM responses and eventually get to the right one.
The stats tell the uncomfortable truth. LLMs are a better overall experience than Stack Overflow, even after accounting for inaccurate answers from the LLM.
Don't forget, human answers on Stack Overflow were also often wrong or delayed by hours or days.
I think we're romanticizing the quality of the average human response on Stack Overflow.