This is an excellent point, David. A lot of people need to write as part of their livelihood, but most of us are not writing fiction. We write reports and plans and memos and e-mails. We write press releases, ad and catalog copy. We are writing for blogs and social media outlets. There is an element of creativity in this work, no doubt. But first and foremost this writing requires structure and clarity. I am unconvinced, as you are, that these skills will be better learned through "creative" writing at a young age.