This is a nice fantasy. In practice, maintaining tools that help you scaffold common code patterns take more time to create and maintain than it does to copy, paste, and edit.

Turns out LLMs are REALLY good at "make me this thing that is 90% the same as another thing I've built / you've seen before, but with this 10% being different"

Also, by your own metrics, laziness is a virtue, and copying, pasting, and editing is much easier and lazier than maintaining boilerplate tools. So it's not even following your 3 commandments.