As I said in a sibling reply: practice is much easier and so it is much easier to get good. Film was expensive and so few could afford to become good photographers. Sure everyone had a camera, many of them nice SLRs with decent lens (but probably not auto focus - for both better and worse), but it wouldn't take a lot of photos to exceed that cost in film.
It is pretty hard to break out but people still make names for themselves either from experience on assignments like the old days but also from instagram and other social media followings. People still need weddings shot and professional portraits taken which takes some skill in understanding the logistics of how to actually do that job well efficiently and managing your equipment.