Earlier quoted context omitted.
The point is these things are wrong sold. The speed of writing code like you have already noted is already is not biggest bottleneck in software development. However what these kind of books/posts fail to sell is as much as software development is about building code to automate things, at some point in time one wonders if software development itself can be automated to a very large extent. The answer is writing code…
How often do you have to delete 1000 lines of code? I know I never had to.
It could even be as simple as moving cursor 1000 lines below or above. Or doing bulk operations.