In the articles I've read they have mentioned that certain breeds may already have issues with taurine and so are more sensitive to foods causing issues with taurine whether it be from not containing enough or whatever is going on. But the emphasis on that is that they are higher risk for developing it and/or maybe just develop it sooner than other dogs would on the same diet but it's still the diet causing issues.
Actually, if you read the actual science journal article (as opposed to internet articles putting a spin on it), there is no proof of causation as to any ingredients yet. It's just correlation. And reverse causation and spurious correlation haven't been ruled out yet in the published veterinary research. Confounding variables are also possibly in play.
The UC Davis researchers' article was preliminary and speculative IMHO. They have nothing -- literally nothing -- but correlation and hypothesis. Breed, gut flora, amount fed, and ingredients are all on the table for the researchers, and the best GUESS is it will be some constellation of multiple of these, but it could yet end up being unrelated. The people researching the problem haven't identified causation yet. That hasn't stopped Internet nobodies (and even some vet nutritionists on the payroll of certain food companies) from claiming to know things the UC Davis researchers working on the problem don't actually know though.
Play with the Google doc spreadsheet and control for Goldens to filter them out to see for yourself how complex this is. Some of the remaining mutts are Golden Doodles. Then there's not much left. I found working with the data filters is enormously eye opening.
To put it into perspective as to why diet doesn't necessarily equal across-the-board causation when there are underlying genetics potentially in play, think about Celiac disease. I eat gluten daily. I love bread, and I delight in gluten-containing grains. My genes reflect generations of wheat-eaters in Europe. I digest it well, and it agrees with me. Whole grains with gluten are a staple in my diet -- I'm happy to eat a bowl of cooked wheatberries or bulgur. What makes me thrive though would make someone with Celiac very ill. It's not that wheat bread causes illness uniformly, but rather that some humans can't digest the gluten in it. Same with lactose intolerance. I don't think it would be all that surprising if there's something like that going on in the dog world -- we know they're sometimes pretty individual in the food they do best on, so maybe there's a gene we don't yet know about that is not playing well with some ingredient in kibble in a few of them. All hypothesis....but food for thought!