Interstellar civilizations

I wonder about finding other sentient beings that have advanced society and technology. The Earth is peculiar in that it has such a large moon relative to its size. Our moon stabilizes our rotation; if it were not there the axis of rotation would have precessed rather widely over the millennium and the climate would have been very chaotic, making the development of a stable and intelligent being difficult if not impossible.

I would at least hypothesize that, absent finding a planet with a large moon, the most likely place to locate other civilizations is probably on planets, around M class stars, that are tidally locked to the central star. This provides the necessary stability and, with the lower energy output of the M class star, would make the planet reasonably temperate, at least in a zone around the terminator.

The life style on such a planet would be very strange to us, no cyclic day or night. We would have to travel back and forth across the terminator to get a nights sleep.

I wonder if this may explain why we have never seen conclusive evidence of an alien visitation. Consider it from the viewpoint of any civilization that has evolved on such a planet. They would understand the necessity of having a plant that is stable over long periods of time. They may have even located other planets with civilizations and all of them have evolved around similar M stars. They might very well come to the (wrong) logical conclusion that advance life forms can only evolve around such stars and, as a result, have made no effort to look at the system around our G star.

They may also have concluded that a planet must be tidally locked to provide the necessary stability and, unless they noticed our planet with its large moon and realized the consequence resulting from that, could easily make the false assumption that life cannot exist here since the only tidally locked planet in our system is Mercury and it is much too hot.