Sentence 1: specified that quote is about one specific kind of speech.
Sentence 2: explains origins of the quote - history. It is the history part that makes this sentence valuable and adds something to the reader (me).
Sentence 3: states that this is not effective to the kind of content we talk about - internet articles.
Sentence 4: concludes that repetition is irrelevant and wrong.
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The way you tl;dr it, the poster would need to completely change the topic to "not repeat themselves". What they did was saying something new with each sentence, just keeping the "repetition" topic on.
Sentence 1: specified that quote is about one specific kind of speech.
Sentence 2: explains origins of the quote - history. It is the history part that makes this sentence valuable and adds something to the reader (me).
Sentence 3: states that this is not effective to the kind of content we talk about - internet articles.
Sentence 4: concludes that repetition is irrelevant and wrong.
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The way you tl;dr it, the poster would need to completely change the topic to "not repeat themselves". What they did was saying something new with each sentence, just keeping the "repetition" topic on.