Yes, I believe the gp has missed the point of the article.
The lesson from "your to-do list isn't difficult, it's impossible" is not nihilism. The point is not that no one is good at anything so why bother; the point is that the feeling of overwhelm, dread, and depression from an impossible- seeming to-do list is rooted in false assumptions. Your to-do list doesn't seem impossibly long, it IS impossibly long! You are born with a to-do list and you will die with a to-do list - but that's OK. We're all in the same boat.
Another helpful way to think about this is a math analogy. Your knowledge is a circle or sphere that has your literal area of expertise. The more your learn, the larger it gets - but you also gain more contact with the unknown.
That is the lesson. Imposter syndrome demystified. Only a fool feels in complete control. One simply does what one can.