First, we need to understand that the state of writing instruction has never been great.
If you are of a Certain Age (say, mine) you may recall a type of writing instruction that we could call the Lego Building Approach. In this method, students are first taught to construct sentences. Then they are taught how to arrange a certain number of sentences into a paragraph. Finally, they are taught to assemble those paragraphs into full essays.
This is junk. It assumes that the basic building block of a piece of writing is a sentence. No-- the basic building block of a piece of writing is an idea. To try to say something without having any idea what you want to say is a fool's errand.
Not that the Lego Building Approach should feel bad for being junk. The instructional writing landscape is littered with junk, clogged with junk, sometimes obscured by the broad shadow of towering junk. And on almost-weekly basis, folks try to sort out what the junk is and how best to clear it away.