Are you suggesting it's illegitimate to prioritize the interests of your fellow human beings above those of non-human creatures?
My viewpoint is that those who are quick to trample on the weakest, including endangered animals, will likely find it easy to trample on the rights of the poor. It is not in my interest to support that potential future where might makes right. Both my interests and non-human interests can be served at the same time, with no conflicts if viewed in the long term.