It confuses me that you can believe this.
The game world is not a real place - it's imaginary. Events are happening in the real world from which events in the imaginary game world are being imputed. There must, therefore, be some mechanism or system by which those real world events are translated into game world events - including (but not limited to) the decisions of the imaginary characters in the game world. How those characters are affected by the (imaginary) events occurring around them must be deduced using some sort of "system", since imaginary characters do not have "reactions" of their own.
Presumably, therefore, you have (and use) such a system already. Is it that you don't believe that this system can be improved upon, and therefore do not wish to consider any alternative? Or is it perhaps somehow important to you that you pretend thiat this system does not exist, or is in some way "the natural way of things"? I'm baffled by your stated opinion, here, given that the system you claim needn't and shouldn't exist already must exist.