It is not today's "sailors" who are risk adverse. It is the people who are funding the missions. When tax payers are responsible for funding space exploration, they are unwilling to accept any sort of loss of life. I'm sure there are plenty more people who would actually take part in spaceflight that would be willing to risk their lives.

That is bogus. Just because the standard is unenforcable does not mean it cannot be followed. It is pretty sad that in our world when people know that someone will not be watching them all the time they can break the rules. And then when they get caught, the authority who set and enforces the rules gets blamed.