I thought the essay was quite clear, and not particularly repetitive.
There are two different ways of acquiring an audience, however. The first is to do some form of market research, however rudimentary or sophisticated it might be, and then to produce some kind of product that conforms to the best sales expectations. If you travel around the country, you see a lot of this: Manhattan from the air at night, Half-Dome, a clearing winter storm in the Rockies, sundown at Jackson Hole, etc. I wouldn't consider this art, really -- I'd consider it a craft. You can find *extremely* able craftsmen who do this work. But it's work that doesn't really lead to anything new, or develop new perceptions of old scenes: there is no new or developing idea behind it. Ansel Adams was an artist; the next guy who produces a great shot of Half Dome is walking on the trail of Ansel Adam's ideas, and is not really showing us anything new.
Then there's the second group, the people who see an important subject, or believe they see an important new way of self-expression, and so they do it, without much regard for whether an audience exists. Diane Arbus was one of those people, as was Robert Frank. Sure, they'd like an audience, but they weren't going to shoot Half Dome to get it. Very often, people in this group never do win an audience, and often, they are seen to fail as artists, because their vision really wasn't anything new or different, or their ideas were trivial. (When Photoshop first came out, you saw people being hailed as revolutionary for applying a series of Photoshop techniques to an otherwise boring photo. Those people are still around, but they're not in the museums. Know why? Because Photoshopping a picture for unusual effects is an essentially trivial activity.) In any case, some of this latter group of people, in working out their ideas, do begin to accumulate an audience as people recognize the worth of the ideas being expressed. This is really a radically different concept than the "market research" approach.
It is, by the way,possible to do both. Avedon, for example, was a great commercial fashion photographer, and I think some of his book work qualifies as genuine art. He was pitching to an audience (art directors) in the first instance, and letting the audience (museum curators and collectors) come to him in the second.
JC