My position: I don't doubt that life, as in living organisms, exists elsewhere. But to me the thought of one specific trait, that one specific species has had for only (roughly) 150,000 years, arising in another planet doesn't make sense. For me, something like, say, sonar is probably more likely, if there are large species, than intelligence.
Intelligence hasn't been around for only 150,000 years. We aren't the only intelligent species on the planet. Dolphins are quite intelligent, for example. It is fair to say that we are the most intelligent species on the planet, but we are not the only one.
Intelligence exists in a whole bunch of animals - the only difference is the level of intelligence.