I've spent my entire career in the media business, both outside (as a Wall Street analyst and advisor) and inside (I worked at TimeWarner for over a decade, where I ran Investor Relations and held a variety of strategy roles).
I love the media business: the dynamism of the business models; the constant jockeying for leverage along the supply chain; the ever-evolving effect of technology; the relative predictability of supply-side dynamics and mystery of demand-side dynamics; and media's influence on, and reflection of, culture.
Generally, I post relatively deep dives (I am often horrified when I finish and see how long Medium estimates they will take to read) and I write because I am trying to figure out the answers, not because I have them. I find writing is a great form of structured learning. It also exposes where my thinking is lazy. It demands clear thinking to create clear exposition.
Another reason I write is to get feedback, so don't be shy!