also i remember maybe Facebook trying to do this when they acquired Parse. For a while they were promoting developers host their backends on Parse / FB .

The idea has merit. You have to relinquish some control to establish security. Look at App Store, Microsoft Store , MacOS App store -- they all sandbox and reduce API scope in order to improve security for consumers.

I'm more on the side of autonomy and trust, but then we have reckless developers doing stuff like this, putting the whole industry on watch.