Sure it is. You can define language all you want, the goal is to communicate with each other. The definition follows usage, not the other way around. Just look up the current definition for literally…

Me, too. But it also means when some people say “that’s a lie” they’re not accusing you of anything, just remarking you’re wrong. And that can lead to misunderstandings.

I’ve had this lengthy discussion before. Some people define a lie as an untrue statement, while others additionally require intent to deceive.