One last point. Only .03% of people in America are published writers. Very, very few people earn a good income from writing. According to the IRS, the average annual income for Indie Authors in the USA is $1000 per year.

The people who make money on sites like Medium, and they're actually writers, are people like Umair Haque and Jessica Wildfire. They are not writing about writing.

It's also fair to say that the people who earn are highly educated, have a talent for writing, and number less than 1% of the population.