I agree with this. For me, though, publishing online often is a good way of trying to get rid of that reader. I’m awfully hard on myself: if left to my own judgment, I doubt I would ever be happy with my own work.
I see Medium as a place where the stakes are low and I can get instant feedback from people who are also trying to improve. To me, it’s less like throwing a baby to the wolves and more like taking the baby to play with older babies. :)