If you're using it to create something you don't know how to do then yeah you're in for a world of disappointment.
HN seems to be of the hivemind that random Joe Nocodes will be firing up VSCode and asking it for a custom version of Uber which.. yeah is laughable and honestly seems pretty obvious that that wont work.
Interesting metaphor. Notice how the Bash tab completion is a great tool, that increases people's productivity by a large amount, and receives only complements from anybody you ask. At the same time, the newish Windows cmd tab completion is a great productivity destroyer that gets mostly only criticism and you will find way too many people blaming it for losing data.
Do you know what is the difference? The bash tab completion is always correct. If it can't be correct, it gives you as much of a correct answer as it can, and leaves the rest up to you. The cmd tab completion doesn't care at all about being correct, it will always give an answer, no matter what you ask for.
If autocomplete on IDEs were that respectful, I'd like them too.
(But I also have no interesting in using Copilot myself, tho maybe I should try it myself now, if only on some toy side project.)
As others have pointed out, at last Stack Overflow comes with context, the ability to rate and comment on suggestions, or even have a discussion about an approach. With this you take it or leave it. Saying you should already know what you need to do and what the tradeoffs are and how to evaluate the quality of the suggestion is basically saying this should have no value to you, and any consequences are all your fault if it does.