It may be useful if you know and like JS already or your have a team of web developers and you need them to build mobile app for you or your client. They should be able to do it without much to learn and your will have an app that can be potentially run on Android and iOS.
The OP didn't ever explicitly say he wanted to create an iOS and an Android app though, and I would agree that if that's not a desire, then React Native is less compelling, especially if OP has never used JS, as you said.
Alternatively, you could use C++ and Qt for both.
If I was an expert in both Android and iOS, and knew nothing of web development... I still think I'd lean toward learning and using React Native. But only then would it be a close call.
Do you think its worth hiring a software developer 5pm-8pm to work on this with me? I was otherwise going to brute force it myself evenings and weekends.
I think you'll save yourself time in the long run (and learn new skills) by going through HTML, CSS (especially flexbox, particularly important in a React Native app) and Javascript (focusing on ES6) base-level material.