It's possible. Or they will someday. There's not enough data to tell the difference. But we're not just separated by space, time is just as vast. We might exist billions of years after them or billions of years before. Or they might be millions of light years away. The same odds that make it likely that we're not alone also mean that it's unlikely that others exist in a time and place where we will ever interact, even in the form of radio signals

If we ever do, that interaction immediately changes the odds to mean that they must be very widespread. And that has its own disturbing implications.

What makes the most sense is that each sentient species flares like a tiny little firework. It rises up, tells its stories, and then fades away. It doesn't really matter if it happens on a single planet over a few hundred thousand years like we're likely to or they beat the odds and spread to thousands of solar systems over millions of years. At the end of it all they'll only have existed in a tiny little place in space for the blink of an eye in the long life of the universe. If they ever meet another civilization it most likely will be in the form of ruins. It sounds bleak but it's beautiful in a different way.

Not anywhere near us, 10 to 20 lightyear bubble.