I actually thought it was some moral dilemma that Bioware didn't have time to implement better.
The clues are there, but you have to look for them. When talking to Samara on the ship, she says that her three daughters were all "ar-dat-yak-shi", and had to stay in one place for the rest of their lives so they wouldn't hurt anyone, but Morinth refused. During the battle between the mother and daughter, Morinth infers that just because she was born different, and didn't want to be kept closed and hidden the rest of her life, she "has to die".
I think it's supposed to infer that you can look at the situation two ways: Samara's view, in which "ar-dat-yak-shi" are a disease and too dangerous to let go of, or Morinth's view, in which she has the right to freedom, and it wasn't her fault that she was born as an "ar-dat-yak-shi", and her mother has gone too far in trying to either quarantine or kill her own daughter.
Of course, maybe Bioware implemented it exactly as they intended it to, and it just took me so long to realize all facets of this because I didn't really talk to Samara except a couple of times because I didn't feel like hanging around and talking to all my crew members that much who weren't on the 2nd floor because loading the map in your OWN SHIP was time-consuming and very very frustrating EVERY TIME YOU GO UP AND DOWN THE ELEVATORS. -_- (Seriously, you can make bullets and ships go faster than the speed of light but you can't make your elevators move faster than a sloth with a turtle shoved up it's @$$?!)
The clues are there, but you have to look for them. When talking to Samara on the ship, she says that her three daughters were all "ar-dat-yak-shi", and had to stay in one place for the rest of their lives so they wouldn't hurt anyone, but Morinth refused. During the battle between the mother and daughter, Morinth infers that just because she was born different, and didn't want to be kept closed and hidden the rest of her life, she "has to die".
I think it's supposed to infer that you can look at the situation two ways: Samara's view, in which "ar-dat-yak-shi" are a disease and too dangerous to let go of, or Morinth's view, in which she has the right to freedom, and it wasn't her fault that she was born as an "ar-dat-yak-shi", and her mother has gone too far in trying to either quarantine or kill her own daughter.
Of course, maybe Bioware implemented it exactly as they intended it to, and it just took me so long to realize all facets of this because I didn't really talk to Samara except a couple of times because I didn't feel like hanging around and talking to all my crew members that much who weren't on the 2nd floor because loading the map in your OWN SHIP was time-consuming and very very frustrating EVERY TIME YOU GO UP AND DOWN THE ELEVATORS. -_- (Seriously, you can make bullets and ships go faster than the speed of light but you can't make your elevators move faster than a sloth with a turtle shoved up it's @$$?!)