The going in hypothesis appears to be that an advanced society will unambiguously try to dominate its neighborhood. Metrics such as the quantity of radiation at certain wavelengths were suggested as possible proxies a few decades ago and accepted without question, even now. The desire and ability to dominate their planet and galaxy, appear to be necessary conditions for “advanced intelligence.” As the presidential race heats up in the US, we do see some “highly advanced intelligent beings” in the race, according to this metric, used by NASA and other ET seeking organizations. One of them, so dominant, he is scaling his domination of real estate to this universe and the next – a sure sign of ET like intelligence.
An advanced society, one could argue, is one that has solved space-time to its advantage. Such a society is unlikely to be restricted by such trivial things as water and Oxygen and they will have no interest to come eye-to-eye with ET seeking sub-intelligence. They are unlikely to be wrapped in radiation, emitted by systems of incompetence and ignorance. They are unlikely to be interested in the tactics of “domination” for there are so much more interesting thoughts that can span the multi-verse.
More practically, one has to wonder if humans are equipped to seek intelligence elsewhere, as they appear to be lacking it.