A terminal does not replace a whiteboard. I know some force candidates to code on whiteboard but that's not what it's specifically good for. A person to person discussion with a white board is the best communications platform for conveying technical ideas, IMO. You need the whiteboard, so both of you can define symbols, then discuss the meaning of these symbols by pointing at them, drawing arrows from them, expanding them, etc. The symbols can include fragments of code, of course.

So, yes, if someone wants to force another person to code on a whiteboard then certainly, they can do better, but it's like asking someone to draw with an axe on the stone floor. Waste of good axe and floor.