Mmm...nice try, but it's specifically mentioned that the Cardassians and Maquis will be trading planets later in the episode and there's no mention of significant casualties.
Because a fringe group like the Maquis has enough resources to provide a ship for every single person to evacuate a planet on an hour's notice.
Terrorist groups are tricky like that. Why do you think it's taken so long for the US to beat Al-Qaida? They all have personal jets fueled and ready to go every time a seal team or drone enter the area.