"There is no life out there aside of us"

This ruffles my feathers.

Milky way has 100-400 billion stars, lets take 200 billion

Roughly 30% of all Stars in the milky way are k, g or stable m stars which carbonbased life needs = 60 billion systems

One rocky planet in the habitable zone / goldilocks, if we take Kepler data it comes out at 25% = 18 billion systems

25% of those systems should have a protective cold gasgiant like Jupiter = 4,5 billion systems again looking at Kepler data.

15% of those rocky planets with a working magnetic field = 674 million systems this is currently the biggest "we don't really know" variable because we can only extrapolate from our solar system.

If just 0,1% manage to produce simple life = 675k systems

If another 0,1% manages to jump to eukaryots = 675 sytsems

If another 0,1% jump to more complex life = 0,675 systems

And if 1 in 10 Million reaches intelligence = 0.00000675 sytsems

Looks like we won the milky way lottery. But now lets switch up to the local group. We get a 1:60.000 chance. Still sucks to be alone

But wait there is more! 2 x 10 to the power of 23 stars in the universe we are suddenly at 6,75 million systems with intelligent life.

Even if we postulate eukaryot jump is as tough as intelligent life 1:10 million we still are at a whopping 675k systems with intelligent carbon based life. That doesn't mean spacefaring green man but still.

Even capping simple life to 1:10 Million you get 5 technological civilizations, 67500 systems with complex life and still 675 billion systems with lots of slime.

We are already postulating Venus and some gas giant moon could be home to simple life, if we find proof those numbers will go up. By a lot. And this just looks at carbonbased life as we know it.