Parent was saying "you don't need to do this in react-native" regarding the following sentence:

With React and React Native, your web app can share most its logic with your iOS and Android apps, but the view layer needs to be implemented separately for each platform.

This is referring to web vs apps, in other words React vs React Native. That's the context of my reply. They are not talking about the (optional) differences within a React Native app to fit different platforms.