I mute people because they post a lot and I simply can't handle the volume.
I unfollow people because they keep talking about stuff that I just don't have the emotional resource to deal with.
I block people because I see them as actively hostile and I don't want to offer anything they can potentially use against me.
I've blocked way more people on Bluesky than I've ever unfollowed or muted. I'm not sure I like what that says about me.