The great physicist Enrico Fermi asked, "Where are they." This is referred to today as the Fermi paradox, but there is no paradox. They are peering through their telescopes, calculating the incredible difficulty of traveling to another star, and deciding to let others, somewhere else, make the effort. That's what I would do.
Of course, some people aren't content to just stay home, sipping Chardonnay in comfort.... But some people are.