While I agree "habitable zone" is a bit of a simplification, it really just serves as a starting point for exploration of the galaxy. If we can find thousands

While I agree "habitable zone" is a bit of a simplification, it really just serves as a starting point for exploration of the galaxy. If we can find thousands of "theoretically habitable" planets, we can pretty much guarantee there are hundreds of thousands of "uniquely habitable planets" like Europa, which we most likely can't detect using our telescopes. Low hanging fruit first.