Trusted moderators would not scale, and likely be against the ethos of the project:

1) mods can't do that at scale. They would need an algo.

2) if the mods use the algo, they could use it manipulatively and it would be very hard for end users to detect

3) business would offer the mods lots of money to subtly bias their content, etc

At this point, why not use twitter? That's exactly what Twitter is. Nostr is supposed to remove the manipulative algo and centralized trust... the things that make Twitter evil.