Your POV about changing one single event in the past and having different overall outcomes being fact .... if it's fact, prove it. Go back in time, change one event, and then tell me how the history plays out. You make the claim, so provide the evidence.
You of course will remind me that we cannot go back in time ... however you might utilize models which, when plugging different elements into it, will show you a different outcome. You will also say, that those events in history are unpredictable and thus unknowable when they will occur ... no dominos, no recipe, etc. You might use models again as evidence.
What I can do, is point to examples of models which HAVE predicted future events. Which you claim is impossible. Not only can I point to models which do it on the macro, world history timeline level (using concepts such as games theory, which I referenced before) .... I can also point to models which will accurately predict the future for an individual on the individual level ... to the degree that we can know 15 minutes in advance to when a person will answer a test question incorrectly and make a mistake (by analyzing the default mode network of the brain, for example). So ... there is evidence which would suggest that what you claim as impossible, is in fact possible to varying degrees on various levels. Hell ... I could even point to subjective and anecdotal paranormal aspects if I wanted to.
So again .... I just simply disagree with your concrete-set-in-stone way of looking at this topic In my opinion, when someone claims something as "impossible" or "unknowable" or simply responds with "you are wrong" .... you should provide evidence to back up your claim. Evidence that cannot be disputed whatsoever. Otherwise, if there is room for doubt .... then your evidence isn't worthy of the absolute terms you are using. It's just as grey as any other theory.
Okay now ... moving on .....