Why can't a liquid move faster than the speed of sound in that medium? - Lemmy.World

I was watching an XKCD “What-If” [https://youtu.be/pfbzrrcQZjs] video recently and Randal off-handedly mentions the title fact as a given. Upon a further Google search I see explanations about why sound moves faster in liquids than gasses but nothing for my specific question. Is there an intuitive explanation for that fact or is it just one of those weird observable facts with no clear explanation