I agree and appreciate that, but I would venture a guess that most of the nearest ones to us likely don't have "earth-like" planets, even accounting for the bias in our viewing capabilities you described. The moons, however! Maybe that bumps the chance of having a habitable celestial body to 0.00001% per solar system? That's my current rough guess. It would be remarkable if "actually life is very easy to form in the universe, it turns out Earth was just first".