I wouldn't want a tool like this deciding what I do or don't see. I thought that was part of the reason from moving away from centralizing platforms. What benefits does this provide over simply not following people?
What if you want to find 100 people who occasionally post content in a narrow area interesting for you, but you have no interest in the rest?
Maybe you don't see the benefit but I can see some people using this considering I know people heavily relying on pleroma filters.