It was an extreme example, to make the point. You can always opt for extreme squinting and/or magnifying glasses, or for heavy pixelation by finagling UI / font size at a lower resolution. The resolution doesn't tell you if the screen shape and size is meeting your needs for single-tasking, multi-tasking, etc.
Personally I find that 16:10 is better a single-tasking, and 16:9 is better at multi-tasking, simply because I like the shapes of the 2 maximized side-by-side windows better, and I'm a little finicky about not showing the desktop when I'm doing something.
I am not saying you are wrong, all I am saying is whoever you quoted is not wrong either.