Your job may be vital to your organization, and you may be "goddamned good" at it, but thats really besides the issue. Any corporate network contains mountains of proprietary data that is placed at risk when people who dont understand how to manage that data (you) attempt to hook up whatever you damn well fancy. Computers are not magic no matter how much you'd like to believe otherwise. Ethernet is not powered by unicorn blood an IT staff are not wizards (no matter how much some of us would like to believe otherwise). Getting a virus is only one potential problem, and truthfully the ability to not get a virus has no bearing on "knowing what you're doing"
At the end of the day, if your flashy electronic status symbol causes a network issue and then no one in your office can work, it really doesnt matter how 'goddamnded good' you are at your job, you cant do everyone elses too.
I've seen a number the power-suit, anger-management, "i'm a type-A", throbbing hard-ons; thinking they're the next Richard Branson. its a great wet-dream until you fuck up and get punted from your high horse by people that care about advancing the goals of the business over their own personal agenda.