If I’m not mistaken, 40K has a major faction that basically lives by PETA ideals, the Tau. (You’ll have to omit the Kroot). The Tau represent an optimistic, largely enlightened vision of the future in proud and self-assured defiance of an otherwise grim world. I’d say that’s fair enough representation of PETA ideals, in competition with other outlooks.
Other factions (mainly humans, plus Snakebite Orks of course) wear fur either because of cultural traditions or because fur is a luxurious, high-status material possession to them. In either case, these people are rarely if ever represented as enlightened.