Which is silly for battlefield roles. A Primaris that can deploy as an infiltrator, an intercessor or a walking tank in Gravis can't pick up a normal boltgun and a missile launcher?
Conversely, a normal marine can't pick up a Cawl pattern bolt rifle and decide the squad doesn't need a plasma gun? It makes no sense to me.
Of course it's silly - the whole way this has been done is silly.
However, until we have official lore absolutely saying one way or the other, we either have to argue based on personal inference, which anyone can toss out as unofficial, or we have to argue based on official lore, which says "Primaris Space Wolves fight this way, standard Space Wolf Astartes fight this way". Its why we can toss out the idea that Primaris fighting a certain way doesn't violation tradition, because as currently written, it does. Primaris Space Wolves, as currently written, violate Space Wolf traditions and culture. Maybe that changes in a few short weeks, but for now, unless someone can pull up official lore that shows that there are Primaris Space Wolf Blood Claws or Primaris Space Wolf Grey Hunters, etc., then there aren't those things officially.
It doesn't matter what our personal inferences are, or how good those might be/how realistic they might be, it doesn't change what is officially written.
Maybe it will just be a minor cultural blip - Primaris Space Wolves only fought this way for 50 years or something - until all had assimilated into the Fenrisian based Space Wolf culture, but we can't say that's officially happened until it officially happens - even if it "makes sense," which I think it does - then it hasn't happened. GW
could write something very different.
Don't get me wrong - I like the Primaris models, and have considered simply making them larger scale standard Astartes - it wouldn't make them Primaris "whatever". I don't have a beef with all the Primaris lore, but I also don't love it - just like I don't have a beef with all of GW
's lore as a whole for any faction or even the setting, but I also don't love it. I'm very much in favor of making anything yours, discard whatever GW
stuff you need to or re-write it to make it fit your story - that still leaves it as just your story, like how my Drakeslayers are probably going to forever be unlike anyone else's and don't conform to GW
's story about them.