animal liberation is a form of applied anarchist principles.
putting yourself in a position where you decide over the life and death of another sentient being is imposing an unjust hierarchy. the moment you assume this position of power over them, you lose a lot of your ability to empathize with their life and their needs.
you are not going to be able to view another sentient being as your comrade in our shared striving for a peaceful existence if you think of their body as something that can serve you.