All of these are very valid questions. We end up reading and writing according to our target niche. When we read we mostly read articles from people who also read our articles. So it may help. Just to improve our writing or learn something here and there. It will help to become better inside the Medium world. I have hardly read many articles or books from the time I started reading and engaging on Medium. I rarely read anything related to my profession these days. But I guess as long as it somehow supports our end goal, whether Medium related or other career goals we are fine.