I have my own theory. The idea is that there are lots, lots and lots of tiny unspoken things which could make huge difference in long run. And those who successful doesn't necessary know their own tiny things they got right. Let's say there are two persons A and B who is training in chess. Person A trained for X hours and became chess master. Person B trained for 10X hours and didn't get even close to master level. T…
I think in a similar way, and one of the nice consequences of this is, as you mention, that there's hope: you can try to attack your problem in as many ways as possible from as many angles as possible and find the "tiny unspoken thing" in a context one might not normally expect it.
An interesting counterpart is that our current education systems are trying their best to suppress creativity and give fish instead of a fishing rod.