I just don't understand, why this text got so much attention. In Russian this usually named Captain Obviousness. - Ineffective ads are extremely typical thing

I just don't understand, why this text got so much attention. In Russian this usually named Captain Obviousness. - Ineffective ads are extremely typical thing on established highly concurrent markets, even if we assume, effectiveness where measured with extremely high accuracy. I believe, author will create another post, with much more details, on how he become to his conclusions. I mean, how measured ad effectiveness, how made a-b testing and/or marketing researches; how many tests where made with changing ad details (color, shape, time to run ad, targeting, etc), to make most effective ads.