I use tofu about once every other week. Also, I have one really good recipe that uses soy crumbles, but that could be replaced by ground turkey. I stopped using soy sauce, more due to the salt content, which really affects me. I use coconut aminos now, which is less salty, but I still use that sparingly.
There's no breast cancer in my family, so I think Red's doctors' opinions are probably good ones.