"I think that people from other stars would not bother coming this far if it took them a ridiculously long amount of time to do it."


At reativistic speeds, time dilation makes it reasonable for ( One-way) trips of only a few decades. Given a longer lifespan, this would NOT rule out any visitors (just bring along the family, or fellow colonists).

Look at what happens if one accelerates at 1 g for a few years. Once one gets near cee, time dilation makes it seem like little time has passed, and one can calculate trips to , say the center of the galaxy taking only a half century ( SHIP time) . Can't stop along the way, though.