I understand the source of your frustration. Let me present the other side of the coin.
Most Windows-using professionals will agree Linux is a technologically superior OS in many ways. Few of us believe the warm, fuzzy poetry from the Microsoft marketing department, or the FUD either. We don't feel any loyalty to Windows like Linux users feel toward their favored OS.
But those of us who are required to run Windows operating systems as part of our job get equally frustated when Linux proponents underestimate the factors preventing us from switching. You can't turn a corporation on a dime; you can't even turn a Mom-and-Pop shop on a silver dollar. If we can't show return on investment, we can't justify making the change. ROI includes more than the cost savings on the OS and apps, but that's all some Linux users invoke when they present their case for switching. It's much easier to justify in the server room behind the scenes, where the only ones who have to directly interact with it are the IT staff. No costly end-user retraining, testing replacement applications, hunting for third-party app support, etc.
In a perfect world, I'd twitch my nose and every one of my users would be runnning Linux with a GUI that looked -exactly- like W95 and open-source apps that looked -exactly- like their Windows counterparts. Yes, that violates the apparently sacred principle of application choice. I want to know if I have to look for another job, all the skills I've gained for supporting users apps will still be useful where I'm applying. By acting as a default industry standard, Windows and Office reduce the amount of training time before a new hire can become productive. If every company runs a different OS GUI and a different office suite, the portability of job skills goes down.
I'm not a big fan of blogs, but I'd love to see a one written by an IT professional who's company is attempting the transition from Windows to Linux, and from proprietary apps to open source, in the server room and on the end user desktops and laptops. If you know of one that is fairly current, please send me the URL. As Kim Possible says, "Please and thank you."
As to security, there's nothing I find more frustrating that people who rail about the lack of security measures taken by Windows developers and user, but never say anything negative about the criminal idiots who write malware. I deserve to be smacked for leaving my door unlocked, but not by someone who lets the burgler off the hook.
The unprofessional lack of concern about security among some sysads will be there regardless of the OS they run, but that's different issue.