The Moon and life on other planets - Science channel

After watching the moon special on the science channel I learned the following listed below, and based on that only, I have leaned further toward the reality that intelligent life may only exist on earth. That is a stretch for me. No doubt. But the special leads me to believe the obstacles in forming life are more difficult than first imagined. I am of course open to more information and could change my mind. But Here is what I learned in a half sleep at 3am.

- The only scenario in which the moon could have formed was when Ortheus (some plantary body) smashed into the earth not once, but twice, quite possibly wiping out anything that may have been living. Giving the earth a clean slate.

-the reminants of that crash become dust and form the moon formed rather quickly.

-The crash in theory initiates the mixing of elements from Orpheus and earth to provide the appropriate elements and atmosphere for life as we know it to begin

-If there was no moon, the earth would wobble, and the weather would probably be uninhabitable for intelligent life as we know it. the variability of the weather would only allow for a very adaptable organism to survive. Life would have to be extremely resilliant in such conditions. If it could live at all.

-The moon is moving away from us, therefor, one day, we may wobble again. Thus wiping out life as we know it.

Given that information:
It would seem improable to me that intelligent life would exist elsewhere. Sure it happened here. But you are really talking about a series of seemingly improbable events to me. There are only two scenarios in outer space. Planets either have a moon or they don't.

If they don't, the conditions are likely so severe due to wobbling that intelligent life as we know it probably couldn't survive. It would take a resilliant organism to survive. In our world such an organism would be less than intelligent.

If a planet does have a moon, that means that life on that planet would likely have to be wiped out entirely before the moon could have formed. And then, the perfect mix of two planetary bodies elements would need to come together to have a chance at intelligent life. After all of that, intelligent life has to survive.

The odds do not seem good to me. I do believe that life is resillient and finds a way. So let's say that it did. Even if everything was perfect. And somehow you got a perfect moon, a perfect mixing of elements, and intelligent life formed, how long could it conceivably survive? long enough for us to find it? Not likely. If a planet has been lucky enough to have a epic collision for form a solar system, and life, and then it is lucky enough to have another epic collision, and form a moon, then that planet is also unlucky enough to have a thousand meteorites homing in on it. They go hand in hand. Given all the collisions that wipe out life is it even conceivable that we would be lucky enough to find it before it was wiped out? It is conceivable that anything would live long enought to communicate with another life form. Anyway, it was all fascinating, but it has me leaning toward the reality that life on earth is the extent of it.