I don't use the app so I confess I'm a little confused, I saw your screenshot and it seems like the end result is just scrolling through nothing. Why would you want that? Isn't it better to just not open it altogether? Like, block the entire thing? Why scroll through a bunch of blur
The screenshot was to demonstrate what blocked posts look like. I scrolled past the posts of my friends since I didn't want to dox them, but organic posts do show up near the top of my feed.
The goal isn't to scroll through nothing, but rather have a clean feed that shows me just my friends and nothing else.
So why blur and not just hide?
It says in the post OP didn't want to fix the layout (and it is implied that empty space is less friendly than blurred content)
Same reason people use app timers when they can elect to not use the app instead.