so if you are serious about understanding the quote, it is the same message commonly given with stocks….
Past performance is not an indicator of future returns.
a common conception is that history will dictate or limit the availability of a country or culture, in that action must spring from a root already established. This quote speaks to not limiting options to just those that are outcomes from already established norms and mores.
You can hate it if you want, but the message is actually quite old and central to American thought. A guiding principle of the enlightenment.
I agree it is not expressed well and Kamalama lama ding dong makes it even worse with use out of context where the message is apparent.