Most people are still on step 1 (learning what the individual words mean). They don't get to the stage of learning how the different words fit together.
Not everyone needs to be a big gas etymology nerd about it and in fact nerdly insistence on what a word "actually" means contra its everyday use is an extremely common error. One that wouldn't be made by someone with even the slightest interest in the domain of linguistics, rather than just feeling smarter than people.