Lower effort for whom? Back when I were a lad, we were told to write so that our readers did not have to work to understand us. The point of writing is to be understood. Old man yells at cloud.
I think it's helpful to keep in mind that with most of examples that get shared around, the choice for the author was not a string of tweets vs blog post, but rather a string of tweets vs not sharing at all.
The point of posting on Twitter is not to be understood, it's to be retweeted.