An example of where this is going is Apple's so-called "System Integrity Protection"[1] which is essentially an access level to system files that's even higher than root. It's Apple arrogantly protecting "their" system from the user, even from the root user:
System Integrity Protection is designed to allow modification of these protected parts only by processes that are signed by Apple and have special entitlements to write to system files, such as Apple software updates and Apple installers.
Only Apple can be trusted to operate what is supposed to be
your computer.
1: https://support.apple.com/en-us/102149
