You should walk the talk. If you want to promote decentralization, you should decentralize yourself, not channel everything you do through social media.
About less and less text on the web, that is a normal thing to happen. Just look at the presidents of the US. First ones were great at writing because dominant mass media was newspapers, then came great orators because of radio, then Kennedy with images and television(staged images and footage), ending with Obama(public speaking live on video).
As technology improves, communication becomes more human, and this is great. Of course, you could feel bad if past technology limitations made you special, like silent film actors did when they lost their stardom.