One issue here is that there’s no economic reason for the home planet to mount the sort of resources it would take to fund an interstellar trip. Stars are fart

One issue here is that there’s no economic reason for the home planet to mount the sort of resources it would take to fund an interstellar trip. Stars are farther away than you think. The only way I can see that it would happen is for religious reasons, if the belief system of the religion required them to do it. Because there’s no economic reason. The other issue is that it’s not clear how long technological civilizations last. We might be close to exhausting our own planet just 150 years after the invention of radio. Maybe technological civilizations bloom in the dark like beautiful flowers, then burn out quickly before they can spread to other systems.