Are there corsairs who would prefer peaceful living over struggle for survival and supremacy? In short - Yes, of course. The thougher question would propably be how infuencial corsair cast looks at them.
They are still corsairs by blood. And blood line is what matters a lot for such nation. But on the other hand they can be looked upon as traitors. Most likely it would fall down to subjective interpretation of each corsair character causing mixed opinions. After all sairs aren't all that unified within socium how they are then they face foreigners.
Anyway. Full house integration to Sirius is impossible. Such attempts would cause social catastrophie which would end up in bloodbath again. Sair society is something totaly diffrent from the ones of other houses and it them separates from the others in great distance. Even if such option might look rational in the terms of survival it would be a foolish idea to fallow.