First of all, which next two solar systems are you referring to? If we haven't completely looked at this system, how can you make such a statement about your next two systems statement?
We haven't visited ANY planets. We've sent probes to several, but their scope has been limited...the first Mars Rover, Curiosity, while on the planet for 9 years, it's covered only around 20 miles of the surface. That's like landing a probe in the Sahara..a small spot in the Sahara, and claiming there's no life there.
Sure there have been other probes to Mars, but theres wayyyy more that hasn't been explored than has.
Plus, there are dozens of moons of planets, which we haven't begun to look at. There's still the potential for other planets that haven't been discovered yet.
Regarding other sentient life visiting those planets, again, we haven't looked closely enough to make any kind of conclusive statement.
From our limited work, absence of life doesn't mean anything.
I wanna hear more about what info you have on these next few systems, though. Let's focus on that.
You seem to be the only person I've EVER heard of to make ANY reference to what's going on outside of our own solar system.
The reason I'm assuming that there's no life on the planets we haven't personally visited, or at least no sentient life more advanced than our own, is because we can see evidence of our own civilization from space. Not only from man-made structures on the ground, but also through the presence of the ISS and thousands of satellites that orbit the Earth.
Yet we haven't seen any of these signs on any planet that we've investigated. They're also isn't any evidence of communication such as TV or radio broadcast.
Now I could be wrong. It might be that these things are detectable, but the government has kept it under wraps. It's also possible that there are aliens living underground or underwater. Perhaps they have abilities or technology that allow them to communicate without the use of electronics. Or they may have an advanced technology that shields their existence from us in ways we can't comprehend.
Perhaps it's too early to tell, but so far all signs suggest that it's pretty lonely out there. That said, I'm still open to the possibility. I'm also making zero guesses on any planet we haven't examined yet.
As for the other solar systems, NASA has been probing, and examining planets in the kepler-22 system for about 10 years now. They've even found a so-called Goldilocks zone with earth like planets that could potentially support human life.
They post the results of their discoveries here.
Exoplanet Catalog - NASA Science
This exoplanet encyclopedia — continuously updated, with more than 5,600 entries — combines interactive 3D models and detailed data on all confirmed exoplanets.
On the side note though, this is exactly the kind of debate and back and forth that I value the most. So thank you for that!