This post is factually wrong about how Facebook works and what the goals are. Facebook does not "uses every nasty trick it can to do one thing: keep you scrolling".
I worked on the feed algorithm for Instagram and know how the Facebook feed algorithm worked in 2020. I read all the code. The #1 goal of the Facebook feed algorithm is to get users to post more. The #2 goal is to get you to engage in interactions like commenting and liking. Facebook cares about how much you scroll and would like you to do more of it, but posting and interacting is way more important. Facebook optimizes for more posting at the measured cost of less scrolling.
Instagram does the same thing but at the time was less successful at it.