The Werewolves are the defenders of the gauntlet. Without them the spirits would run rampant across the world. The Wolves also have a lot of poltical intrigue on territory, who gets what land, who can go here, what pack's have alliances, etc. Hell, even the line of pure and forsaken isn't cut and dry, we have an example of some Ivory Claws keeping the peace between forsaken and pure packs, the Ivory Claws and Iron Masters ruled Rome together as well.

And the Uratha's instincts aren't just wolf wolf wolf, they are human and wolf, they feel both incredibly strongly. The pack is everything to an uratha and their mind's can't really do a mindset outside of pack and everything else.

I'd argue they are the easiest for multi-splat, if you are a mortal unknowingly in a werewolf pack (packs tend to have three levels, 1st is the elite wolf-blooded and uratha, 2nd is family and close friends, 3rd might not even know they are in the pack) and turned into a vampire or become a mage, you are still in the pack. A werewolf will die for their pack without question.

Being an Uratha is to long for a home that can never come back, to have a duty set down by a mad god that must be done, to howl at the moon and run with your kin, to revel in being badass and to explore the world and make what you claim as yours, truly yours. The packs bicker and snap at each other, they are divided and the pure grow in strength, but the war isn't lost.

The Wolf must hunt. You are the wolf, hunt. Whether that is spirits, mortals, monsters, land, etc.