Then again, it could be very possible (given the parameters of time and material) that is a common occurrence. If only one in a million stars produced a life bearing planet, there would still be an almost uncountable number of them in the Universe.
One in a million?
Try one in a quadrillion.
Just because there are trillions of galaxies and perhaps quadrillions of stars, does not mean that the conditions and materials and perfection in alignments would be common, nor would the events needed be necessarily common.