Advanced beings learned how to upload their consciousness to a simulated universe, so they’re not actually out there travelling
According to this video, there’s a scientist named Kurzgestagt, who suggested a theoretical megastructure called a “Matrioshka Brain,” which could surround a star and have enough computer power for an entire species to upload their consciousness into and exist in a simulated universe.
Essentially, aliens could be living entire lives uploaded into a cloud, and not even bother cruising around space to find out what’s out there.