They don't. The person who said this is pushing an agenda trying to scare people away from Windows so his company can make more money.

I feel like the people who work in this space see the post and it doesn't pass the smell test. For everyone else, I do not mind them learning the hard way why most businesses run a certain way.

The obvious answer is the tools fit their needs best. It's not like OSX is some big secret.

You don't have to be an admin on Windows, but you can't do anything if you aren't. At every company that hires me where I have to use their PC, one of the first steps is always to request admin rights, because I need to be able to install dev tools. On Linux, you can have a special user account that can only install apps, without requiring root access. I think that would go a long way to preventing this sort of ransomware.

Although losing data on a user machine should of course never be crippling to a company in the first place. Make sure everything is committed to a central location, as well as backed up at regular times.