Is there something which I need to explain better to you to understand what I am saying? I am really puzzled by your thinking TBH.

This is not a binary thing. It's not like you either have the information or not. It's more like you either have little or no information, satisfying level of information or it can even be an overwhelmingly detailed amount of information. Depending on how much and of what kind of quality of info you have, you can have varying level of leverage. So in effect and by definition that info is not irrelevant.