OP is discussing more so the practice of professional dev for 70 - 90% of the devs. Business guys want results , they dont care about scaling and so its about getting it out ASAP. Theres alot of politics, I was taken aback at first, with the idea of CS/software being very technical but it seems that this creates more of a differentiator for political manipulation, cause everyone is already skilled in analytics.
I could go into more detail but basically its all there and a search away (google). In fact there is a term in the industry called "google-fu" (like kung-fu) which means the number of searchers you need to perform to get an answer.
Its a double edge sword. All devs are on their own for learning, but all the info is out there, you just need to be willing to search and learn.
Sadly many people are not like that, and that seperates the good dev from the bad dev (besides the politics).
I assume its the same for being a surgeon, that all you have to do is study and learn the info and you can do it. But having a steady hand is very important. And sadly , if everyone had a steady hand , you'd still have the same amount of surgeons. Those who can do. You want to be a dev, open up the next tab and type into your tool bar "how to learn javascript". Realize that devs created this tool for you, and if you are not a dev its because you dont want to be. Its all there, the web is your oyster.