What alien life might look like?

Yesterday, I was thinking what life is. Then I saw a TED video by David Deutsch, who called life a "chemical scum". And he's so right. I mean imagine an alien who has never seen life before. What does he see? He sees molecules. Molecules sometimes form planets, sometimes they merge or split releasing energy, for example in a star. So what does he see when he comes to the Earth? He sees molecules that interact with eachother in the limits of the Laws of Physics. Phisics is what defines what is permitted in our Universe. So basicaly what this alien sees is some molecules who interact with eachother in an uncommon way, not like for example molecules on a rock. Even if you think of humans and human society. That is no different to grass or lifeless objects, in that it is just a bunch of atoms that in the limits of phisicys, at this point in space, at this time, interact with eachother in a way, that it creates a thing that is collectively know as humanity.

So what is my point. My point is that when we search for extraterrestrial life forms, they may be fundamentally different than us. That is they may not even be lifelike, it could be the case that there is another cube of space at this time, where the laws of phisics make molecules, and energy interact with eachother in a way that it creates some totally wierd, outlandish phenomenon, that we can't even imagine now. Life is no different than a black hole, in that it is just a phenomenon that under certain conditions with some probability, exists. It's just one property of the Universe and what physics allow.