This needs to be taken with a grain of salt.
Another recent long-term study with long-term T treatment of men around 70 years old found a higher rate of BPH in the control group than in the treatment group over a two-year observation period (Hajjar, et al, 1997).
And saying prostate cancer is "usually driven by Testosterone" is a little misleading. it would be more accurate to say that prostate cancers seem to be driven by DHT, a byproduct of Testosterone,in which case you could take finasteride, dutasteride, or even Biotest's M.
And, there's some evidence that the most virulent prostate cancers are driven by estrogen, or that at least estrogen acts synergistically with DHT in causing BPH.