Question

What does PI mean when he says," The obsession with putting ourselves at the center of everything is the bane not only of theologists but also of zoologists

Answer 1

When PI says that quote, he means that the human race perceive themselves as superior at everything. He also uses the technique of anthropomorphism ( to give human traits to animals) to imply that we look past all the idiosyncratic qualities of animals and we decide to give animals the traits of us, the humans.
I don't know if it's good or not, but I hope this helps