I think you dramatically underestimate how much your own mind is a product of narratives, some of which are self-selected, many of which are influenced by others.

Perhaps, but what you said is unfalsifiable and/or unknowable.

Ideologies are not invented unless you're a caveman. We all got to know the world by listening to others.

The subject of discussion is if and when external forces can alter those ideologies at will. And I have not seen any evidence to support the feasibility of that at scale.