You are referring to the root word (Chrio):
khree'-o Probably akin to G5530 through the idea of contact; to smear or rub with oil, that is, (by implication) to consecrate to an office or religious service: - anoint.
The root word is "to anoint," "Chrio," which I suppose is where you get your idea that it means "to rub." It is always used to mean "to anoint", and never only "to rub," although there is rubbing going on when there is anointing. It is used throughout both the Old (in the LXX) and New Testament to mean the same thing: to rub with oil for the purposes of consecrating. The New Testament was written by Jews who, by the way, also spoke common Greek.
Carus has been dead for a hundred years and is an atheist. I'm going to take a wild guess and say that you do not have any contemporary scholars to help you on this.
I do not know Greek and I rely on my sources.
You can believe what you want. You have a bunch of numskulls not fluent in Greek guessing words and that’s what they came up with.
All gods are empty words. What happens is the same as cancer with cells. They start going crazy. With words they cause a contagious social disease. These guys came up with a word which became a cancer.