I think most of what you say here is true and insightful.

But I do think you make a false assumption that there exists some universal morality.

I think we can, and should, learn to cooperate. But that's not the same as what most people mean by "morality". And it doesn't really imply that we should treat animals with in the same way we treat people.

I've written about that here: https://medium.com/the-panopticon-publication/morality-is-personal-and-tribal-always-20c8c31f5d29