You have one option…

I have never understood why people are serious when they use the saying “You have (only) one option.” In a situation where there is only one choice. To me, this has always been kind of a joke because the very definition of “option” is “the power or right of choosing”, “something that may be or is chosen”, or “the act of choosing”. Perhaps this started out as a joke and over time it became a statement of grave seriousness.