You can research which instance you want to build your account on; if you are worried about an echo chamber then I would look for an instance that is clear about what they defederate with, or even run your own. I'm fine with not seeing extremist views and don't mind defederating with Nazi content
All these companies are constantly pushing just how greedy they can be and it's getting so tiresome. Short term gains and shareholders are the worst thing to happen to a free Internet aside from governments