Very few people actually want to filter through the unadulterated garbage of the internet on their own. What you want to do on social media is like, read the ne

Very few people actually want to filter through the unadulterated garbage of the internet on their own. What you want to do on social media is like, read the news, talk to friends, or promote your work. You probably don't want to spend every minute of your online presence blocking new spammers, new trolls, death threats, conspiracy theories, and the like, just to make your feed somewhat usable. So you delegate this task to moderators. On a centralized platform like Twitter or Facebook, you don't get to choose moderators. Facebook decides it doesn't belong on its platform? It's gone. You have no recourse. With Mastodon, you get to a) pick a server with policies that you like in the first place b) you can switch to another server if you're unhappy with the original one. Server blocks are just an extension of that function. If a spammer creates a new server under their own control and creates a million accounts to send spam from, do you expect moderators from other servers to just click "block" a million times? No, that's why the bulk option exists. There's no way it couldn't.