I can't think of any other reason, but I'm an Agnostic.
Something tells me you would be less than careful in carrying out an animal sacrifice.
There's no reason for me to carry out an animal sacrifice.
Well that's obvious, isn't it? So, you think "victimless crimes" are unimportant?
There's no reason for me to carry out an animal sacrifice.
Of course not, since there's no "magical sky fairy," right?
I’m not sure you’re getting the point of morality. Morality is about “right and wrong”, not whatever is practical for social survival.
Otherwise, there is no point in discussing morality at all. Just try to survive and live out your animal life.