Even worse is the lack of any separate superuser privileges.
There has always been user access control in the NT family of windows, and it has been actively put to use since Vista.
The problem is just that they don't work. Not in Windows, not in OSX, not in Linux. People just get conditioned to enter their root/admin password whenever prompted without thinking twice about it. The people who do know what they are doing and what they should not be doing would not need this to begin with, so it becomes a pointless feature.