I don't think this is a problem unique to JavaScript, however. We see the same sort of thing around technologies. Right now it's ML and Blockchain, earlier it was Cloud and IOT. The industry in general appears to be mostly built on inventing problems that can be solved by the tech, framework, etc. rather than leveraging technology to solve an existing problem.
This may be part of why you're having a hard time finding the problems JavaScript may solve for you. Personally, I find it much easier to follow the "Just In Time Learning" model https://blog.codinghorror.com/keeping-up-and-just-in-time-le.... Find out what parts you need in order to solve your problems, learn how they work, and leave the rest until you need it.