Are we really the only ones in all the galaxies?

Whether or not what people see in the sky are from another planet or secret government aircraft we are not the only people in the universe (or beyond it). Look at the mathematics, for as long as the universe is suppose to be here along with the number of stars it is impossible for live not to have happened on another planet. Taking the thought eons ago some primordial ooze was in the right place at the right time when a bolt of lightning zapped life into it. If it could happen here, then it could have happened out there. To believe it could only have happened here would be as if 5 states got together to create a powerball lotto and after one person won it, it would roll over perpetually with out ever having another winner. But that never happens, someone always win again. How could it be that being a numbers game or randomization of events that it could happen once and never repeat itself please you science, logic, math etc, to support the argument? To believe mankind is the only sentient beings in all the galaxies would not be rather arrogant?