If the seeded cannabis you bought was good, there is a pretty decent chance that the plant you're growing from those seeds is good or at least ok as well.
"If" the plant, was a hermie, those seeds would likely be feminized (thus producing s1 or selfed seed)...If the plant was accidentally cross pollinated by a close male or another hermie, Im assuming the grower would have maintained similar quality genetics, and its a coin toss as to whether or not its good..
The downside..probably not the best seeds to breed with if pollen came from a hermie plant.
Toad