[Windflier]

If life is rare on Earth and even rarer in the Solar System, it's probably rare everywhere else, too.

But life isn't rare on Earth, and from that, we can reasonably infer that it isn't rare throughout the universe.

You're arguing that the small size of the biomass on our planet in relation to the large size of the geologic mass, means that life is "rare". It's not.

It's ubiquitous throughout the outer layers of our world, and will likely be ubiquitous on the surfaces and oceans of countless other worlds. Some of that life is quite likely to be intelligent, as well.

[Moonman62]

You're arguing that the small size of the biomass on our planet in relation to the large size of the geologic mass, means that life is "rare". It's not. It's ubiquitous throughout the outer layers of our world,

What objective measure do you have to back up your claim? If you were to take away the mass of the planet and its gravity, or for that matter the mass of the Sun and its energy, would life exist at all?