Avira > The notion of intelligent life contradicts the ideas of Hashem not creating something for no reason
As the first Beis symbolizes, we do not know everything that Hashem knows. There might be other worlds that we do not know of (or were as Midrash Rabba posits: אָמַר רַבִּי אַבָּהוּ מְלַמֵּד שֶׁהָיָה בּוֹרֵא עוֹלָמוֹת וּמַחֲרִיבָן, עַד שֶׁבָּרָא אֶת אֵלּוּ) and Hashem does not care for us to know of. If we were to encounter another civilization, then we will have more questions, but until then I would not worry too much.