You’re making a point mostly about aesthetics. But regardless of aesthetics, to be a working artist, the artist needs to make money.
Sounds like you make money partially by teaching and partially by gallery sales. Which are two of the commercially viable paths that are mentioned in this essay.
> Then over time, if you get paid for the art, cut down on the part-time job, and repeat.
The point of this article is simply that the above will not happen by accident.