Some features of the world are not intuitively comprehensible because we've not evolved to comprehend them.  In fact we've likely evolved to not comprehend them.
-Lauren/Blend

What if a your decision was based on a truly random event, if such a thing exists, for example the position of an electron?

Hume is right: "the best prediction of future behavior is from the observation of  past behavior" (but its not cause/effect,  it is just a statistical probability that is more likely to be correct than a guess)

With due respect, I don't see your point in the slightest.

The 'habits of the mind' that Hume speaks about are not formed by rational thought; they are part of the human "machinery" (example our habit of forming the idea of necessity after observing constant conjunctions between events).

So when we reflect on our ideas, our beliefs and how we get to know them, we can discover things about how that internal machinery.

whoop whoop