- 1,026
- 754
We do visually see it destroyed, plus its stated.The South Area was intact in the movie. At King Kai's request, Goku travels to a ravaged planet in the South Area, following traces of Broly's energy. If I recall correctly, New Planet Vegeta is in the South Area, too.
So there is two solutions
1- Treat the location as a PIS
2-Or broly left some planets and stars un-destroyed. Which even if we assume he left a whole galaxy intact, wouldn't effect the results that much.