The nuisance model on Mastodon is different. Silos push everyone together in the same space, so you pretty much have to fight to protect your own little corner.

People you might like to remove from your experience will tend to congregate on certain instances favorable to that kind of thinking. You have the power to block that instance at an individual level. There isn't the same impetus to deplatform them because you can just break the link.

I have many (but not all) "free speech" instances blocked because they're packed with users who try to force that perspective on me by (for example) removing content warnings when replying. I don't have to appeal to any authority to enforce my boundaries. Only the owners can decide who has the power to make those decisions on centralized social media sites. That seems to be outsourced moderators with little or no understanding of niche or marginalized communities.