Of course. I get that is how it works. I've seen it demonstrated, and have demonstrated it myself. I can understand that there is only one wave form within the band limit that can fit. I can analogise it to drawing a perfect circle with only two points.
But to the layman : Everyone who has been told how digital audio works at the very basic level has (at best**) been told that that you interpolate to join up the dots. How you do that with just 1 point above the line and one point below the line, and get to a perfect sinewave is, as I stated, counterintuitive.
** At worst, they've simply been told "straight lines" or even worse "stair steps"