I find it useful, and it brings value to me (literally: I exchange valuable money for API access), even if it doesn't for you. Many other people report the exact same thing. Just because you don't find value in a technology, doesn't mean that others don't.
In the past week I have used it for helping write a script in a framework I'm not super familiar with (OpenSCAD), I was able to finish a project in 5 minutes that otherwise would have taken me hours. I have used it to help make movie recommendations (none of them were hallucinated). I have used it to translate a conversation with a non-english speaker, etc. There are other tools that can help me do all of these things, but none quite as fast or painlessly.
It might not be useful for your use case of asking questions related to specific web specs, but that doesn't mean that the technology has no value. Horses for courses...
In the past week I have used it for helping write a script in a framework I'm not super familiar with (OpenSCAD), I was able to finish a project in 5 minutes that otherwise would have taken me hours. I have used it to help make movie recommendations (none of them were hallucinated). I have used it to translate a conversation with a non-english speaker, etc. There are other tools that can help me do all of these things, but none quite as fast or painlessly.
It might not be useful for your use case of asking questions related to specific web specs, but that doesn't mean that the technology has no value. Horses for courses...