Aliens - Are they out there? Have they visited us? And related questions

[Welsh cake]

That's 60,000,000,000,000,000,000,000 Planets

Even if 1/10 are in the goldilocks zone.

That's 6,000,000,000,000,000,000,000 planets in the goldilocks zone.

If only 1% of those have the conditions necessary for life

That's 60,000,000,000,000,000,000 planets where abiogenesis can happen

What estimates would you hazard that said planet not only existed within the goldilocks zone but also had a Jupiter-like gas-giant planet neighbour that acted like a "cosmic vacuum" preventing the majority of impacts from meteorites and stray comets obliterating the celestial body?

Not to mention calculating the instances where life can arise from non-life and evolve to a sentient race that forms a cooperative society that survives long enough from internal and external factors (wars, disease, mass extinction events and so on) to prosper and become so ridiculously technologically advanced they've developed a means of detecting Earth-like planets that can support life and construct the means to achieve faster than light space travel to get there?

While still possible, I have to admit the odds (if they can ever be worked out) aren't simply minute, they're infinitesimal.