I feel like you're being obtuse. The concept of free speech was not invented by the US Constitution and has existed long before it was written. Free Speech as a societal principle and ideal has been around for hundreds of years.
"Free speech" might be a societal deal, but it's never meant what you are claiming it means. You are free to redefine it as you like, but it's never meant people are forced to publish your book or an employer can't fire you for being rude.
