That's a bit harsh. Note that studying advertising might differ significantly from practicing it. For all you know, there could be a PhD out there researching

That's a bit harsh. Note that studying advertising might differ significantly from practicing it. For all you know, there could be a PhD out there researching the moral implications of Facebook's advertising practices during the 2010s. I have actually read most of the dissertation today, and it sure is about the creativity you reject it to be about.