I have few ideas. Why can't people create their own filter bubbles? Lists do that in some sense. How about "For You" tab but for a particular List so that recom

I have few ideas. Why can't people create their own filter bubbles? Lists do that in some sense. How about "For You" tab but for a particular List so that recommendations expand and let me get the feel of that particular List's filter bubble. Why can't I choose to browse Twitter as it appears to a particular category of people e.g. say a mathematician or neuroscientist? Twitter is all public, there is no fear of de-anonymizing anyone if Twitter decides to implement such a feature.