The difference that I'm trying to highlight is that calling something "luck" takes away the responsibility of the actors. This is a dangerous mentality for a founder, because their own actions and decisions are all they have in the pursuit of success.

> I see people putting in "a concerted effort day-in and day-out... to put themselves in a position to succeed" but they generally don't know ahead of time all those factors necessary, so after several years of not succeeding... what did they do wrong?

They took wrong actions in pursuit of their goals. Whether they can pinpoint specific actions is up to the individual, and ultimately it's a guessing game. But to throw your hands up and declare luck is a weak-minded excuse—certainly we must acknowledge that given infinite possibilities, success was possible, they just didn't find the right path.