Honestly, it may not be enough. People, including sci-fi writers, chronically misunderstand the scale of space and how populations could fill in that space in a true galaxy-wide civilization.

Estimates place the number of stars in the Milky Way at 100 billion. This would work out to 10 billion lives per star in the galaxy. That doesn't seem unreasonable, when we know that ecumenopoli exist and smaller versions of them exist in much larger numbers. We also know that terraforming of otherwise non-hospitable worlds is readily achieved in the SW universe. On top of that there are 5-25 million different species of sapient life, bringing even more classes of planets into this calculation.