One of the Drake variables is the percentage of stars having planets. These kinds of things are being filled in. It would also be helpful to find life on another planet or moon.
It would also be significant to find an earthlike planet without life.
My only point is that SETI can be and is being researched on many fronts.
wow that would be amazing. Although I wonder if a planet can become earthlike without life - where would the oxygen come from?