The beauty of open source is that you're free to fork the repo to include your own tooling if you so wish. Those who share the same concern as you can then go

The beauty of open source is that you're free to fork the repo to include your own tooling if you so wish. Those who share the same concern as you can then go ahead to use your fork. Nobody is pushing anyone to use Expo's SDK. You are free to choose whether to use it or not. In the same way, you are free to use Facebook's React Native framework or not (bear in mind Facebook is a listed entity with its own corporate objectives as well).