If you remove the content propagation based on smart algorithms then you have to provide to the users something else in return otherwise they will not be motivated to use your app.
Instagram back in the days showed only posts from followers, then they saw that this strategy is not engaging users to use the app properly and some “good” content doesn’t arrive to you simply because you don’t follow someone. Then they invented this smart feed based on things you like.
I don’t think smart algorithms are generally bad, it depends how you use them. I don’t want my feed to be full of memes to spike my dopamine level and take all my attention because I simply like them, but maybe I would like some services or content that I specifically search for to be more accessible.
Another point I wanted to make is that TikTok by my opinion was created by a government to promote different political views and get huge money from it, wins the one with more money. It was created with a specific goal, and clear business model. It’s a big business but Nostr has to find its own way how to play in this game if wanted.
I don’t know about #Rumble, it’s first time I hear about them, if you want you can share more about it