So we just got a fancy new spy/malware/virus killer loaded onto our machines here at the office, and I ran my little scan and lo and behold! it found a piece of adware on the old CPU here. So I go to the control panel and I get the basically zero information it tells me about the dumb thing, and I go to kill it... and I can't. I don't have the option of killing it, it's just quarantined.
What option do I have? I'm glad you asked. My one option that I can do is to ALLOW THE ADWARE TO RUN ON MY MACHINE. It's adware. It's going to spam my computer with crap. It's worthless drivel, and I don't want/need it. But can I get rid of it? No. All I can do is authorize the stupid thing to do its thang. If I wanted to kill it I'd have to be an Admin.
So... idiot end-users can't kill the malware on their computer because they're not authorized, but those same idiot end-users can set the malware free on their PC to wreak whatever havoc it can.