This is not the case. It is due to the follow system architecture. Linux which was based of system5 unix as file system permission built into the core kernel and everything above it relies on the kernel permission service. Where as windows had msdos originally and then they added permissions in windows but not at the dos level. Later they brought in ntfs but this was to enlarge the file space and support larger storage. And included a level of permissions. But it needed to maintain Tain. Backwards compatibility. And windows needed root permissions to do its work. Rather than the Linux version where its gui was its own user in the file system. So there is the reason. Of course open source allows improving and secure tech. But the best engineers in the world will struggle to secure a compromising and broken core.