Everything else, even if it has a better technical fit for your project, is likely riskier for your organization.
If I was going to learn a language though, I'd probably learn Golang. Their rate is so much higher.
We're hyper-specializing people in a specific framework that then don't even understand the basics of JavaScript itself.
I already find the divide between frontend and backend developers unnecessary the majority of the time. This takes it a step further and in turn creates monstrosities like the leftpad debacle.
Can we stop with this nonsense? Hire good developers and let them spend 5 minutes to learn the god damn framework of the week. If your hire can't learn React in a week, I have some bad news for you.