I'm not going to act to save a kitten.
Why don't you want to save the kitten?
I'm going to let the kitten suffer and die
It would be highly immoral to let the kitten suffer and die, I think you should reconsider.  If you save the kitten, you will feel much better about yourself and your conscious will be clean.  If you let the kitten suffer, you will feel guilty for a long time which is not good for your mental health.
It's wrong to exert dominance and control over animals, we are humans and we have a higher position than animals.
In this situation, you would not be reacting with dominance, you would be reacting with kindness and compassion. It's cruel to let an animal suffer when you could help it, and I hope you choose to help.