So with all due respect I think you’re coming at this from a different set of experiences and assumptions as to what constitutes “good content.”
I’m a transsexual and many of us have already migrated into closed Discord servers in order to specifically avoid what you consider to be “benefits” of federating with large instances.
The same things you think are so great about Reddit have been driving us off the platform for years in search of more niche and protected communities.
I’m not denying that your use case here is valid. Just that it’s a very mainstream view of what good social media is. But mainstream appeal doesn’t necessarily mean better for all of us in all communities.
The fediverse has the potential in the digital world to be like gay villages once were in meat world. Isolated and self-segregated, safer than most places though hate crimes and bath house raids still continued, and essential for organizing networks of support/protection between ourselves.
This is an interesting idea and provides some inspiration thank you