What are those supposedly easy CRUD apps that you are working on? The most CRUDy platform I worked on (it was really a collection of forms and lists) was packed full with integrations to external services. To create a new page, you just had to copy and paste. But to bring in the actual feature requires to write multiple files of business logic and more integration modules to third parties.
My experience with CRUD backends is that you get bogged down in really convoluted business logic and abstraction layers, and most of your time is neither spent writing or thinking, but debugging. (Of course debugging involves thinking, but it requires you to step around, print, inspect, and explore how data flows, rather than exclusively thinking up new solutions). And in my opinion, debugging is easier if you can faster navigate your code and more quickly type or edit small changes.