I wouldn't think of it that way. But you are right there are many types of cancer. Some well known and others not as much. But breast cancer is by far the most recognized. Major sports like NFL, baseball and even pro wrestling( yes I know sports entertainment) all recognize it. No is forcing you to honor it but if you want to buy a exclusive shader and I would love an emblem then do so. Just hard to pick and choose. Would love to have options for others like prostate cancer, even Leukemia. Would a option possibly be (and even possible) to have a Destiny cause of the month? You could purchase a shader/emblem and proceeds go to that cause, wouldn't have to be cancer it could be Autism, Vets, and certainly international causes.