Maybe the reason why we feel like we don't exist when we don't post online, is because people no longer check up on us outside of the internet. We used to get text messages or phone calls from family and friends. Now they all just check our Facebook profile. So, if you don't post, or worse, if you have no Facebook profile, it makes it look like you don't exist. And to an extent, maybe unconsciously, this make us feel like we don't exist.
Deep Work advocates locking things down and going distraction free to focus on your work. While Show Your Work advocates giving out continual updates on your work and making use of social media to do so.
Cal would say that the time spent promoting your work on social media, is time better spent doing work or improving your skills. It’s basically a distraction. And in his book, he quotes some people who actually benefited from avoiding social media and focusing on deep work.
Austin would say, if you want your work to be discovered, then you need to keep sharing updates on it. Usage of social media is one of the best ways to do that. Actually his book gives out great advice on what to post on social media. No, he advises against posting about your life or documenting your life on social media. Rather, he suggests posting about what you're working on. Show your work, not show your life.