"No one" does not literally mean "not a single individual" in common English parlance, something that everyone (see what I did there?) here understands.
Yes it does. If I'm asked how many people are in the pool and I respond "no one", that means not a single individual.
That's because you are asking for a specific count. If I am gauging the quality of some restaurant for example and someone said no one goes there, I would not assume that to mean not a single person goes there.
It literally does mean that.
It figuratively does not.
You’re not going to change the meaning of two words, here…
Literally does mean figuratively, since a few centuries ago, so no need to change the meaning of the word. Regardless, people understood what was meant, it seems only you are taking it, well, literally.