I didn't know about flow being a term in biking, TIL thanks. However, my opinion on vaguely related splash images before blog posts being indicative of superfic

I didn't know about flow being a term in biking, TIL thanks. However, my opinion on vaguely related splash images before blog posts being indicative of superficial content where SEO is sought after more than sharing original or useful info is unchanged. This is solely based on my own experience reading various blogs, hence my initial question regarding what is at the heart of this trend if not simply SEO.