With that many chances?<quoted text>
The estimation is in the many billions. As yet astronomy has only scratched the surface of the local area of the milky way. See the Keplar mission
There is however another limitation (to life as we know it), not only solar goldilocks zones but also theorised galactic goldilocks zones
Which does reduce the possible candidate planets to -… still many billions.
But then there is the possibility of life as we don’t know it.
Even if the odds were a million to one against?
We'd still see hundreds of millions of life-inhabited planets-- live as we know it here (i.e. carbon/DNA-like protein-based life)
Of course-- there are a number of details in DNA that could just as easily have been slightly different (left hand rotation, versus right hand rotation to name one of the more interesting).
That would mean, if by some amazing tech, the two life systems would not be compatible with each other.
And, as you point out? Life as we do **not** know it?
Means that there are billions of life-filled planets out there.