Do Effective & Efficient Web Sites Really Need SEO?

Pedro Dias, a former Googler, posted on Twitter this line "Doing SEO means either the website, or the search engine, or both, are not dealing effectively--and, to some extent, efficiently--with the web as they should." In which, Gary Illyes from Google responded "Or both are doing well, but the website owner is talked into something they don't actually need."...