Yes, or no to tamoxifen

Has anyone used the predict app to determine whether it’s worth it to take hormone therapy following surgery? I will be having a skin preserving mastectomy, with likely no radiation needed, but I know the doctor wants me on Tamoxifen for five years. Looking at the results of the predict app, there’s only a one or 2% difference in the survival rate at 5, 10 and 15 years. I’m already suffering after having to stop taking estrogen, progesterone, and testosterone, and I’m not sure that I want to make those symptoms worse by taking tamoxifen. Has anyone chosen not to use hormone therapy?