Earlier quoted context omitted.
Because as someone who has done support for a 28000 person organisation, 27500 of which are using mostly Microsoft products on windows for 90% of the time and 500 of which are using Mac or Linux and doing other stuff I can tell you that at least 50% of the security incidents and second line support issues came from those 500 users.
This seems like a clear case of selection bias. People with Linux and Mac are probably devs and technical people who will obviously utilize a much broader range of functionality of their machines and thus encounter more edge cases.
You more or less need to be a dev-ish person to prove IT is at fault. The lusers have to live with the unplug the computer and reboot workarounds.