Bloggers were always a minority, because most people have little or nothing interesting to say. If you asked them to write a long essay on a subject, they just couldn't. This is why social media was a godsend to a lot of non-bloggers, because it made them feel that their 140/280 character sound bites were worth publishing on the web. These people can never "go back" to blogging, because they never did and never would write blogs.

Setting that problem aside, another problem is that people have become accustomed/addicted to receiving links via social media rather than via RSS. This is a big problem for current/former bloggers who wish to leave social media. It's difficult to take their followers with them. You'll lose a big chunk of your audience if you rely entirely on RSS to publish. After leaving Twitter, my RSS readership doesn't seem to have grown. AFAICT it's the same as before.