You're acting as if React makes it impossible to do anything else. As needs to be iterated every time we have one of these threads: you're still free to do it the "old way" -- writing your backend in X lang, your iPhone app in Swift, your Desktop apps in C++, your Android app in Java, and your web frontend in HTML/SASS/JS/jQuery. Nobody is stopping you.
The truth is that people want their apps on multiple devices these days, and many apps wouldn't exist without react, at least not a port for your platform of choice. Yes, React sacrifices convenience for performance, but that has always been a trade-off. You'll notice very few people writing apps in C these days.
That being said:
What native features are you lacking?
What apps are you using that are noticeably slower than native alternatives?
My main complaint with React Native is the memory usage, but that is getting better and better and my computer has tons of RAM these days.
