Cool Worlds is a good resource for anyone wondering about life out there. We grew up so terrified of being stupidly self-centered that we assumed life cannot be rare (though distances are too big for contact). Life might be extremely rare after all, because the odds are so small that they can overwhelm the big numbers of how many galaxies, etc. there are. Even if life is not rare, intelligent life takes so long to evolve that it has a tiny window before its birth planet dies.
Consider us, even. Life appeared almost instantly here. We are in the Goldilocks zone in our solar system, have an extraordinarily 'quiet' sun and the solar system is also in the Goldilocks zone in our galaxy. We had incredible luck to collide with Thea, get our moon, a little kick to our rotation speed and therefore a stronger magnetic field. We had incredible luck to have Jupiter to attract the space junk (though the last point recently came under discussion). However, intelligent life probably would have never evolved on our planet if a space rock didn't hit one of the rare spots of volatile rock, which compounded its impact and wiped out most life. Yup, the dinosaurs.
That is, all the amazing luck Earth had was nothing if not for one unlikely destruction event. Still, we will look for intelligent life because what if?