I used to think echo chambers are bad. I realized that when algorithms force me to consume content that I don't agree with, my mood becomes terrible. In order to protect myself, I no longer think echo chambers are pure bad. They are a necessary evil to ensure my own sanity.
In the real world you congregate with like-minded people. The same applies to my social media timeline. And I use Mastodon by the way, which doesn't have an algorithm driven timeline.