I will commit the sin of consecutive posting because I'm in a talkative mood and thought I could expand a bit more on my comments. I'm very pedantic lately, sorry

.
The reason I say hereditary is more flexible and overall superior plot-wise is because a) the more connections within your fantastic context you start with, the more subplots you can weave from the get-go, the more characters you can have without going through the ordeal of having to introduce each one properly, and with all those threads, the story can increase in complexity far beyond a bite-story, b) All those connections can be exploited much more effectively and sooner in the story for emotional effect on the reader and c) bite stories, as varied as they could seem to some, they all have pretty much the same linear structure, independently of any events in the timeline. Plot complexity gives you more story structuring options to choose from, as is the case with werewolf clans (you can start as a child before coming of age and turning, as an old man reminiscing, as a young wolf just being betrayed by his own brother, from the POV of a human protegee of the werewolf clan, in the middle of an underground war between fantastic beasts, maybe fantastic beasts are commonplace and the werewolves can live normal lives in the open, or maybe they can't and are plotting to infiltrate government institutions to gather power, etc).
If you start with a bite, there are three things that usually must happen in such a story: MC needs to get bit, usually in traumatic moments, he then needs to learn how to be a werewolf, and then needs to accept himself or die somehow if he doesn't. That's pretty much it. If you stray from this too much, the story will lose appeal, because you're focusing solely on the one MC, and more specifically, you are focusing on his gradual transformation and discovery. That is the main purpose of bite stories--cast of one will always be more limited in plot structure. But with a werewolf family? Now there the focus isn't so one-directional. It's more unpredictable because it has more moving pieces. Once you normalize lycanthropy a bit, you can see past the obvious misty superficial charm of it and start digging deeper into what it entails and what it could mean for the MC, and how it interacts with the rest of the world.
A bite story is about the journey to being a werewolf, genetic lycanthropy is about a character that just happens to be a werewolf. You can get away with a lot more in the latter. The change of focus opens up new worlds, IMO. Then again, it's all about the goal of the writer's story. Same story+2 genres=different worlds

.