There is another explanation. Consider how long we've been spewing forth our radio and TV radiation. If we make a large leap in technology, one that eliminates the inherent 'waste of radiation' in our communications programs, we would conceivably end our transmission status, at what entire length of emission period? We may indeed have many more advanced civilizations around us but are unable to detect them due to their efficiency level. [And for the record, since I've seen craft that are definitely not of this planet technology, I DO believe we are visited fairly regularly. It is the ingrained arrogance of the Fermi postulate that astounds one ... he assumed we at our current technological level were in the mainstream of civilizations possible for contact.]
I also believe in God. However, God did not create this universe just for us..
I haven't.