This is such hand-wavy bullshit. It's such a lazy response to OPs point...
Are humans animals? If so, should we not consume the products that humans create, in order to achieve perfect veganism? And if people are not animals, and I'm feeling a bit hungry........?
The computer or phone you used to post your comment is an animal product. Unless, yet again, we consider humans to be above animals, and therefore exempt from all the rules, and veganism is cannibalizing itself, philosophically.
Absolutist veganism (which is a beautiful idealism) exists heavily in a state of cognitive dissonance.