Science fiction gives dilemmas with no clean answer. That is exactly what written justifications need.
Arguments
Most convincing first · reading is open before and after you vote
If it's realistic, my argument can come from my own life instead of from lore I had to read first.
Fantasy lets us invent the rules together. The community literally builds the world, not just steers a story.
Real-world settings drag real politics in. Symbolic stakes keep a new community calmer.