I agree that Steem could be much better, but unfortunately I also don't know how to make it better. Probably by drawing some inspiration from Reddit, which is somehow similar, but way more popular.

About YouTube: the whole platform got way more professional as it grew. Just compare a typical video on YouTube today with one from ten years ago. Back then everything was very amateurish and low-quality (in terms of production value, not in terms of content). The problem with the professionalisation is, that it favours big media outlets, who have the capacities to create content with a high production value. I think, that the recommender algorithm also favours big media outlets, probably not even on purpose, but just because their videos get a lot of views and are made by a verified creator, which are indicators the algorithm uses to recommend their videos to others.

Voice is a curious case, I'm interessted to see, how this turns out. Even though I was a bit disappointed when it was announced: block.one build up so much hype and the big announcement was something that everybody saw kind of coming already.