I think people neglect to write blog posts because the feedback loop is not as tangible as the onslaught of (sometimes mechanical) likes or faves that you can receive on a social network. With blogging, you need a little faith that you will gain an audience. And on the open web, you never know who might come along and expand your audience.
“Over on Twitter today, I was inspired to ask people to write “just one blog post” today. Later, it occurred to me that after 10+ years on Twitter, I am privileged to have a substantial following. I thought I would take the opportunity to help promote some folks who don’t have as much immediate reach.”