Everyone thinks, speaks, or writes in real time. There is often no time to consult rules and definitions. The more economical we are managing our grammars, the better we manage our language skills.
We need good language economy, for good grammar.
Let us try a mild brainteaser. If we compare our results with family, friends, or other people, and get consistent results, we can consider the idea natural, even if we are not familiar with it.