CRUD apps are ridiculously simple and have been in existence my entire life. Yet it is surprisingly difficult to make a basic CRUD and host it somewhere. The bulk of useful but simple business apps are just a CRUD with a tiny bit of customisation and integration around them.

It is true that LLMs make it easier to build these kind of things without having to become a competent programmer first.

conventionally, it should have been abstracted by a higher-level language.

E.g using Rails and generate scaffolding. Makes it real fast and easy to make a CRUD app.