I find this a very odd take... You are free to say whatever you want, however people are also free to not listen to you. Why is the freedom to not listen seen as a "lesser" freedom than the freedom to say what you want?
The main benefit of federation like Mastodon and Lemmy is that if you and like-minded people in your community don't wish to listen to vitriol being spewed then you don't have to. Don't like it? Go and find an instance that does tolerate it and does want to listen.