Definitely, but that doesn't change the simple logic that if you have a conclusion, it's very easy to lose the truth of a historical situation by instead selecting an explanation that you want.
Let's say there is a historical event, and you know of 3 different possible explanations. Explanation 1 is what you learned as a child and it's clearly wrong now because of new evidence. Explanation 2 and 3 both fit all known facts and either one could be correct -- but only explanation 2 fits with your conclusion that the world is always heading towards liberalism (or conservatism or whatever you believe).
Do you pick explanation 2? Human nature says you do, and it's something we need to be aware of.
> You have to reify past events to fit current conclusions because you have no past understanding of those events that's reliable.
Do you really have to?