Some people seem to be missing the context in which this article was written: 80000 hours is about effective altruism, in the sense of deliberately building a career that does the most good in the world (whether that be charitable work, politics, or "earning to give" as a software engineer / banker / etc). The article itself doesn't explicitly state this unfortunately.

So yeah, the advice is very nuts and bolts, and several of the points don't make any sense without that context (e.g. picking the low-hanging fruits). It's assumed that the reader is already highly motivated to have an impactful altruistic career, and that this motivation is a primary source of self-fulfillment.

Just pointing this out because there seems to be a bit of confusion in the comments here.