The effects of those two are very large, the effects of everything else comparatively small per decades of startup and longitudinal entrepreneurial studies.
Nonsense about hustle is exactly that: nonsense. The weight of evidence suggests that, if anything, hustling and creativity have a net negative effect on long term health of a startup.
But there's money to be made keeping up the lie.
Lastly, beware of pseudo-pop-science that opens with only a few people's stories. People manage to succeed as founders all over the world; these stories are not remarkable and tell us nothing.
In general the whole "determination" thing has little to no value in any serious consideration of startup success: it's about on the same level of credibility as diet fads.