An absolutist definition like that is completely and utterly meaningless unless the only person you talk to is yourself. And even then there are concequences for what you say to yourself, even though they might not be externally visable immediately. And if you want to get really ridiculous concequences of saying anything involve movements of air and possibly particles of spit. Maybe even spreading an infection.
So by your definition freedom of speech cannot exist, or you need to refine your meaning of "concequences". That refined meaning is accepted as conceqences from the government.
Any other meaning is senseless because people are free agents and may respond to your speech in any way they feel fit.
I see freedom of speech starts and ends at the government can't compel or supress your speech.
Your employer or society in general absolutely can via the consequences of what you say. If you are making your employer look bad then they can and should be able to get rid of you.
If society decides they don't like you because of what you say and choose not to associate with you or use your business than that also feels fair enough.
Free in "freedom of speech" is the ability to say anything you want.
Your choice of free means cost.
So you're free to speak, but the speech itself isn't free.