If you believe that ransomware doesn't exist for macOS and Linux I'm afraid you've been misinformed.
I was asked once to do reference design of Windows on AWS. After I learned how many ports has to be open for every machine and all of them had to be in same network as Domain Controller, I quit my job.
> If you believe that ransomware doesn't exist for macOS
Example? I have not seen any.
Windows holds perceived monopoly on company-wide identity control. There are Mac solutions: https://www.jamf.com/products/jamf-pro/deployment/