If you look at an average user's feed, it probably breaks down into 30% traditional advertising, 20% nontraditional advertising (via influencers and friends shilling for their employers and promoting their side hustles), 30% content by people they have no social relationship with (celebrities, etc.), 15% low-quality posts from acquaintances, and 5% content from legitimate friends.
That is a whole lot of junk to have to sift through just to get the occasional scrap of legitimate social interaction.
These are advertising networks first, and social networks a distant second, even though they ostensibly involve social graphs.
So I can understand the fatigue people feel about having to scroll and scroll and scroll just to stay in the loop with people they have an existing social relationship with and genuinely want to know what's going on in their lives.