You are confused. While having mobile-friendly web sites is beneficial to Google in many ways, I'm sure, you are arguing that it is the only benefit of having a

You are confused. While having mobile-friendly web sites is beneficial to Google in many ways, I'm sure, you are arguing that it is the only benefit of having a mobile-friendly web site which is false. I am positive, from your own personal experience and mine, that you will not continue viewing any web site that is difficult to read or navigate on your mobile device. I am positive that any site that is not mobile-friendly has far more dropouts than one that does. Mobile viewing has become a huge part of any web site's visitors. To ignore their ability to view your page is a word that might get me downvoted. To post in search results that a site is mobile-friendly is an aid to the searcher because they know they won't be wasting their time trying to view non-friendly sites. It is helpful.