The "would prevent unsavory posts from popping up on their platforms" issue can happen in leiu of advertising. See nos.social. And yes, there is a target audience for this.

EVERY PLATFORM SHOULD REMAIN EMPOWERED TO REMOVE/HIDE/FILTER/CENSOR CONTENT THAT GOES AGAINST THEIR TERMS OF SERVICE. Nostr as a protocol, with or without advertising does not alter that.

For example, even without ads, Corny Chat does not advertise all rooms.

Freedom of Speech ≠ Freedom of Reach