Splashing colors, fonts and pictures around free text is not marketing. The prevalent transactional design SOP over the last few decades was A/B's on "pig lipstick" for customers often not capable of judging possibly good outcomes. We suffered (and sold) multiple delusions of "portals" and "destination sites" only imagining their own immersive relevance to customer gazes. Those who did better or avoided over investment were exceptionally wise.
We have years and decades to clean up the Web dump from inoperative airbrushing at most local or broad market service reaches. I don't know who teaches real decision support based information architecture for commercial markets. We have data now on what works and what does not with requisite methods and metrics. Someone might fill a gaping niche.