True, as the quote wasn't aimed at beginners. Keeping in mind that I was running the opposite implication (that the same flowchart for beginners is still suitable for experts), the mapping remains, although we (pace the XKCD!) probably ought to make explicit what that improvement might be:
Dealing with failure is easy: Work hard to improve [your ability to identify what subset/spike of the project could be successful].
Dealing with failure is easy: Work hard to improve [your ability to identify what subset/spike of the project could be successful].