You still can't compare the ease of an access. It is like Google+click to read the article vs emailing authors for every article you want to read. At least that

You still can't compare the ease of an access. It is like Google+click to read the article vs emailing authors for every article you want to read. At least that would decrease reading efficiency of the related research, at most - reduce the coverage of the studied material, just because it would require substantial amount of time, compared to direct click. That, in turn, might reduce the percentage of ideas that came during reading others' articles. Think of Sci-Hub as a hypertext engine for science. You copy DOI, you press the Enter, and you are reading an article.