Because reasons ... First every CRUD app has specific differences in: the UI, authorization system, rules, It is not taught enough in classic computer science

Because reasons ... First every CRUD app has specific differences in: the UI, authorization system, rules, It is not taught enough in classic computer science classes (what I did) to reuse existing patterns/RAD/frameworks Also it is to an extend automated: ui libraries, widgets, SQL/NOSQL, admin interfaces etc are existing and could be viewed, as automation.