Command-line was just an example. In some instances, a seemingly difficult problem can be solved trivially with standard tools found on most Unix-like operating systems like GNU/Linux.
But if we're talking about programming, then we're not talking about putting some formulas in Excel---that's what I'd expect of far less technical positions, ranging from accounting, to data entry, to your average person looking to understand some simple data a little bit better. Someone trained to use Excel is stuck with morphing problems into Excel's domain rather than being able to apply general building blocks to other problems.
You can do some pretty complicated stuff in Excel that requires strong technical skill; I'm not implying otherwise.