Because there are worker bees, soldier bees, queen bees and drones.
The boredom isn't the work, it's the rote.
This needs to be a military operation, with people who have it drilled into them about the chain of command, respect and duty.
A mixed group of civilians picked from tbe 1% who are rich, have internet access and advanced degrees ain't about that life. They're used to having an unseen support network. How many of these people are ready for real role playing? Where they might not be the top of their food chain?
A one way trip means Jim Jones and developing completely alien ways of surviving the environment which would be against the cultural mores of home. Kind of like prison.
It also means carefully balancing the cultural expectations of who does go. 50 West Indians and 3 cacs will vibe differently than 50 Muslims and 3 Hindu or 50 Asian dudes and 3 Jewish bytches.
Or 50 Asian bytches and 3 Protestant nikkas.