‘Cause Windoze technology has surged several years past effective security technology for same. Even though Bill Gates brags that the stuff has been in there since he wrote the first byte of Windoze, it had to be controlled. It’s like a house with locks that, when installed per the accompanying instructions, let anybody in.
Linux and other UNIX work-alikes, along with true UNIX systems, have the advantage of effective security being designed in from the get-go.
This is a red herring. The fact is that it is possible to lock down a Windows installation so that it becomes far more difficult for security problems to occur. If an organization chooses not to do this, then that is its own fault.