Particularly the bit about "Don’t reinvent the steel hammer” is a little ridiculous in this analogy. A medieval blacksmith had to build almost all of their own

Particularly the bit about "Don’t reinvent the steel hammer” is a little ridiculous in this analogy. A medieval blacksmith had to build almost all of their own tools, that was the reality of the thing, because almost nothing was pre-manufactured. Similarly, if you look into the toolbox of almost any mechanic, or carpenter, or millwright, or any tradesperson, really, you are going to see some modded or homebrew tools, that they have put together specifically for some particular job that they do. Jigs, cut down wrenches for tight places, weird welded up gobs of metal that aren't immediately obvious but are super useful for x, y or z. A good software developer should have a whole arsenal of little shell scripts and tweaks and customizations to their editor or IDE that make their work easier.