The good part is federated alternatives do not look like massive echo chambers like Twitter is. Even if certain server does turn into an echo chamber the rest of network can just leave that server alone. Federation is closer to our actual societies. People don't clash on daily basis in our societies at least not as much as they do on Twitter. In real life, we avoid certain topics or getting involved with certain groups or going to regions/squares in cities where we know there is possibility of conflict. All these aspects are already well replicated into fediverse.