It's a tool. It's as useful as you make it.
You can use a power drill to drill holes in the wall, but also to drill holes in your foot, or try to use it as a hammer. The person who chose to use it to drill holes in the wall is more likely to regard it as useful than the person trying to use it as a hammer.
Stating something as your personal opinion does not magically elevate it to an objective fact. The things that people have accomplished with AI speak for themselves - those are objective facts.
If you, personally, have not been able to get AI to do what you want, then that's just a reflection of your choice of attempted tasks and how you're wielding the tool. Those experience are objective facts too.
Where you make zero sense is in asserting that your own failures mean that others must be failing too. That's just arrogance and stupidity. It's like you tried to run a 4 minute mile, came in at 10 minutes, and then confidently stated "Running a 4 minute mile is impossible. That's not an opinion, that's an objective fact."
I guess you'd most likely throw some italics in their too, and resort insults if you got frustrated by someone else pointing out that running a 4 minute mile is, in fact, possible.
I'm amused to see your continued responses. Evidentially your time isn't quite as precious as you think it is.