We're judging a fictional, and future culture by current standards. Right now we live in a risk averse culture that has demonised death to the point where we refer to it by euphemisms, we try and extend our childhoods, push back the time when we should have families and settle down. The bold, intrepid reaching for the stars that took place at the start of the twentieth century, with the advances in transportation of all sorts, all the way to the 1960s, when nations chased the moon, is all something that is way in the past. We now live in a society where the US space programme shuts down for half a decade following an accident in introspective navel gazing and contrition. Faulty batteries ground an airliner. Fear of death has made us extremely risk averse. Fear of being sued, and excessive compensation claims have made us even more so. The UK is currently descibed as a nanny state, refering to the excessive regulation and legislation designed to keep people safe. It's a society where fun is only permitted under certain rules.
Maybe in the 24th, they've got back to that point in society where they accept death as a part of life, and don't wrap everyone up in cotton wool and bubble wrap. Maybe they weigh up the benefits of having families on ships against the dangers and choose that the benefits are worth the risk.