A lot of people see the usefulness of PeerTube but don't move because the creators they watch are on YouTube. It's the same for the creators, though - they can't move off of YouTube entirely, because none of their viewers will go to a PeerTube instance just to watch that one creator. Thus nobody moves to PT unless there are other factors (like extremist creators moving because their videos keep getting removed by YT).
Another major problem that prevents creators from hosting on PeerTube is that there are no ads - many see direct-from-YouTube revenue driven by Premium views/Ad views generate a significant portion of their income. Even Linus Tech Tips, with their audience of gamers who mostly running an ad blocker, sees YouTube generate 26% of their profit[0], almost exactly as much as they get from sponsors spots in their videos. If everyone were to move to PT, we'd either need an intermediary for ads, or only creators with audiences that could afford to personally finance them (via Patreon or similar) would be able to survive and make a living off of running their channel.
Another major problem that prevents creators from hosting on PeerTube is that there are no ads - many see direct-from-YouTube revenue driven by Premium views/Ad views generate a significant portion of their income. Even Linus Tech Tips, with their audience of gamers who mostly running an ad blocker, sees YouTube generate 26% of their profit[0], almost exactly as much as they get from sponsors spots in their videos. If everyone were to move to PT, we'd either need an intermediary for ads, or only creators with audiences that could afford to personally finance them (via Patreon or similar) would be able to survive and make a living off of running their channel.
0: https://youtu.be/-zt57TWkTF4?t=391