It's harder than it looks. To make an average CRUD app the current state of the art, you need to know a very large number of tools, each of which has its own ecosystem of alternatives, each of which has a different philosophy. This makes it all but impossible to offer a course on the subject that meets any standard of exhaustiveness. So the would-be web developer has to wade through a morass of conflicting ideas on best-practices and will inevitably screw something important up, like authorization.
Then you have the constantly-shifting nature of the field, forcing you to continuously study to stay on top. It's much more difficult than it looks to an insider who already put in the hours learning.
Then you have the constantly-shifting nature of the field, forcing you to continuously study to stay on top. It's much more difficult than it looks to an insider who already put in the hours learning.