How is that different from email though? Email providers will block whole swaths of IPs without telling you but you don't really notice it because it's very likely those IPs are only being used maliciously.

We're in a weird time right now though. Most people choose an email provider based on word of mouth or what their friends use but not enough people know about Mastodon to make that possible. Maybe Mastodon itself isn't the right answer, but I hope that a federated/distributed system is.