I take it you’ve never been a part of a community that has been sabotaged before. Haven’t you noticed how every community seems to go to $h!t when it gets too big? Communities that grow large enough become subjected to greed, politics, and appealing to the lowest common denominator. These are important social problems that can’t just be ignored. They need to be solved, otherwise we’ll just keep repeating history.
I apologize for not explaining well enough how the platform I’d like to build would work. It’s not just filtering based on ideology. It also finds users for you who have similar interests, it recommends things to you one degree outside your bubble, you can control how large or small your bubble is. It filters out the noise. Also the data you put into the algorithm is time sensitive. Content you liked/disliked in the last 10 weeks holds more bias in the discovery of like-minded users and new content than the content you liked 10 years ago does. You can also take a deep dive at anytime and have it recommend something random but popular, like StumbleUpon did.
Embrace the bubble. Humans are by their very nature tribal animals. Stop trying to fight it!