It's an artifact of how the software works right now. Of course, this could be changed in the future in any number of ways. Things are likely to develop rapidly given the influx of users. Many of these folks are developers and can and will add and change things to make it work better. That's the great thing about open source.

its a scaling thing and it makes sense in a lot of ways, discoverability however needs to be better. Inevitable instances will want curated default views while users need more power to see everything or block what they dont like easily.