Can you make projects that work with external databases with remoteXY? Read and write files on your phone. Use the camera, scan barcodes, use sensors that are in the phone, e.g. NFC? Generate an APK file or its equivalent for ios there? In my opinion, remoteXY is mainly focused on communication with arduino and similar. It's a less complex environment, so it's easier to pass Apple approval. Ai2 allows you to create complex, advanced apps, which is why Apple is careful about it.
But of course I'm also in favor of adding BLE as a built-in Ai2 component. In my opinion, nothing stands in the way, especially since Mit has a refined BLE code as an extension. If BLE was a component in ai2 then it would also be available in ios.