Those people are completely misinformed then. The OS did not come free. You paid for it. You pay for the license every time you buy a computer. If KDE had that then yeah it would by annoying, but they probably wouldn't be asking then.
Most places tell you how much you are paying for it. I have to go out of my way to not pay for it since I don't plan on using windows when I buy a new device.
As a developer, I have met developers that don't understand file systems. They could write code and not find it. Like wtf?