[bagasme]

In context of SO, garbage in garbage out (GIGO) applies. That is, many ChatGPT-generated answers look "almost" correct but actually they aren't. While many of SO answers which might became data model for the bot training are high-quality and correct, there are many other answers which are questionable (low-quality posts). Also, bots (ChatGPT included) don't take and understand surrounding context like humans do. So, without context, no matter how good something is, people with subject-matter expertise can (and will) see the fishy behind it.

[sachinjain]

This isn't backed by any data but I feel confident to say there are so many questions on SO that can be answered by Chat-GPT correctly. If you open the home page of StackOverflow and see the new questions coming in topics like Python, JS, there are many questions related to syntax error, giving wrong output, etc and ChatGPT can be valuable in those scenarios.