It started with all courses teaching algorithms but on the day job you wrote all algorithms by searching it on web or via a library.

Now they teach language but you just ask agents to check the accuracy of code and rarely read it.

Only few devs wrote new algorithms and only few devs will now write the actual new code. These few devs don't need courses but all other devs need to pretend that they are part of these "few" so they need all the courses, just in case...