Earlier quoted context omitted.
Well, at least it's obvious where this is coming from. > You will look like a genius because you'll have an encyclopedic knowledge > You can learn esoteric knowledge about programming – and you will pay an incredibly steep price for it. If you want to be effective, stay clear of this one. Systems are going to be increasingly complex to the point where it's absolutely impossible for any one person to understand it all…
How so? Knowing as much as possible about the systems should be the norm, it is a super power because most people are too lazy to be bothered with this. Knowing the system makes it very easy to poke the relevant people, find the relevant people and have meaningful discussions with those. Heck, it might even turn you into a meaningful person yourself. The alternative is stumblong aimlessly around and parroting input f…
Mastery is alluring - it's just not very effective and certainly really bad advice for new software devs, who are in the worst possible position to judge the margins and what is useful.