Using line of site communication such as laser would probably not be the best way for interstellar communications. Largly because as empty as the universe is. I

Using line of site communication such as laser would probably not be the best way for interstellar communications. Largly because as empty as the universe is. It's hard to shoot a straight line in any direction and not hit something, and also the high energy requirements. Lasers are only being used in this case for bandwidth issues not latency issues. As both lasers, and radio travel at the speed of light. SETI is using the most likely method of detecting communications as we don't know of any faster means to communicate than EMR.