On the other hand, a disaster like that will almost certainly result in casualties. Plus, the rockets used to get into space are believed to be safe, but not close to foolproof. They estimate 5% of the volunteers will be killed in the launch, and a further 10% killed in the first year at the colonies. They don't know what the statistics are like afterwards, and returning to Earth will be difficult at best.
If they get enough people, the plan is almost certain to succeed, and after these first footholds in space, further exploration is certain.
Do you volunteer?