I love the video game metaphor. Just because you're playing at the "easy" level in a video game doesn't mean it is easy to finish the game. You have to put in the time and effort, and the last boss can still be difficult.

This might be the origin of the metaphor: https://whatever.scalzi.com/2012/05/15/straight-white-male-t...

I think the qualification is necessary. Even Warren Buffet admits that he got rich in a very specific way using skills that would be all but useless in any other context but him winning the "ovarian lottery". https://www.sloww.co/ovarian-lottery/

Not really. Good advice is often specific and actionable. People have to adapt it to their circumstances. OP included a warning to make it clear that this isn't a guarantee and to give specific circumstances in which his advice is sound.

What's the alternative? How else could you write an article that conveys the steps you took to achieve a goal, if not to write the steps you took?

It's an obligatory warning, otherwise people (even here on HN) will decry your methods as mainly due to privilege, and irreproducible for the average perso.

Most people reading this paragraph start with the same luck coefficient.

(Not all, so no need to add your personal story here. But most.)