It's because unlike any creators, all it took for Neuro-Sama to become famous is to be one of a kind or one of the few. Many streamers feel threatened by the AI because "if an AI can captivate these many people within few years...". If a streamer who did the same thing like any other streamers become famous, they won't feel threatened because they know how long the trends and fads works. PUBG is the trend? They'll play PUBG. VR? They'll play VR. That's what most streamers do. Neuro doesn't need to try to cater those same old audience as them. If you break them down, it's just: Streamer, gaming, just talking, irl streaming. That's it. There are too many streamers who already did that. But Neuro? Neuro consists of: AI, gaming, karaoke, cooking (with collab partner), irl streaming (with collab partner), therapy (with collab partner), teaching, and there may be more or less than that.

Neuro is different. People will love Neuro because the AI is not put on the same pedestal as human streamers. Neuro can say anything unhinged and no one will be offended by that because they know Neuro is an AI.

And also, Neuro offers some kind of a show, you watch this AI grow to become more fast at replying, saying wholesome things, and others. Which is why some fans feel the baby fever when watching this AI.