I'm going to leave my roommate's plant destroyed by my cat after I warned her
Is the plant going to be able to live?
It will take some time to heal from the trauma but I'm confident it will heal.
It is bad that your pet destroyed something. You should control the behavior of your pets. You will need to make this right.
I'm going to let my cat keep torturing the plant.
Try to put yourself in your roommate's shoes and understand how they would feel about your pet doing this. Try to get your cat to behave better in this situation.