@DashEquals@linuxrocks.online key word there is shouldn't. they can still access your content, and in many harassment campaigns, this means access to crucial information. even if it's something as simple as "screenshots of what you just posted to trash you on their platform, fuelling mob mentality of harassment to recruit others to do that work".
blocking is a more firm and clear boundary than just muting, as well. punishments are typically a lot harsher for crossing that boundary.