While I am no professional, and by no means an expert, and have made far less money from my photography then the equipment that I have purchased to enjoy the hobby. I will say this:
If you read his words and don't interpret his words to make sense, then I agree most of it is horse shit.
Does your equipment matter? Yes.
Will owning expensive equipment make you a better photographer? No
Will expensive equipment make it so that you are able to capture better images? Yes
Will the equipment improve your artistic eye? No
Will it enable you to take photographs and capture the vision in your artistic eye? Yes (With proper time, learning, experimentation and dedication)
On the statement of having too much equipment is your biggest enemy: This can be true if you are fumbling around with equipment when trying to catch that vision.
I remember being at a football game (audience member). I shoot solely with prime lenses (as if forces me to plan my shots, take my time, and enables me to take lower light shots). I had my longest lens on the camera taking shots of people on the field. When I heard a jet in the distance, I didn't react quickly enough, and by the time I'd put on my wide angle lens to capture the moment, it was too late. If I had been using a zoom lens, or if I had been operating in a two camera environment (one long and one wide) I would have gotten the shot. This was a case where too specialized and too "much" equipment "ruined" the photograph.
Both the photographer and the equipment matter. Even if I owned an M8, and the glass to go with it, I would not produce the images that the real artists make.
I rarely produce anything that I would call art. I have not developed an eye for it, I never studied any form of art as a child, adolescent or adult. I've learned by playing around with different things, failing and succeeding at times.
With each upgrade of my equipment, the "quality" of the images, from a technical standpoint (pixels, colors, Focus, dirt) increases. And with each upgrade of my "eye" the "quality" of my images, from an artistic standpoint (framing, proper usage of equipment, angles, message) increases.
Back on topic: The author is either/or/all of the following: a horrid writer, ignorant, misguided, intending to motivate, using absolutes because he doesn't know not to, or using absolutes to rile people up.