I can see how it might read that way, but totally not the intent.
Ship a 30-year-old, and you're shipping a person still in reproductive prime, who may have a whole lot of regrets being stuck out there, a lot of things they'll never get the chance to do. Psychologically, that's huge.
Today, 60+ is for many still good intellectual and physical life. But older folks have had a chance to live, love, raise a family if they so desire. Such a person can still have the physical and mental chops to do a lot of good work, but can walk into it knowing they've done more of the normal human things to do that they wanted.