Basically, the timeline was just another word used for the feed. He didn't want to see the feed that everyone was posting because he knows it just saps your at

Basically, the timeline was just another word used for the feed. He didn't want to see the feed that everyone was posting because he knows it just saps your attention / can be toxic, but he wanted the ability to post on other people's feeds so they would see the content he wanted to promote.