This concerns me for so many reasons:
Firstly; drugs like tamoxifen bring on early menopause and ageing, and are no fun to take for a long time. It is also implicated in some endometrial cancers.
Secondly; giving drugs to the healthy has huge knock-on effects to the future of drug use and efficacy, and it is impossible to prove a benefit. I cite the over-use of antibiotics in humans and animals and the devastating repercussions for their potency against common illness now which is a developing crisis. Also the over-use of wormers which has led to resistance and poisoning.
Thirdly; I suspect that this decision has been partially politically driven as breast cancer has such a huge, rich and militant representation. I question whether - in the long term and taking into account all of the above- it would not be more cost effective to give prophylactic surgeries to those who are at the highest risk, and request it. Call me a cynic; but I also have good reason to believe that many women have expensive and devastating treatments for very early changes in breast tissue, and would not have needed them if monitored.
I am concerned that other cancer patients - not just ovarian- will inevitably find that the availability of their treatments become scarcer as more and more drugs are given to those who might or might not need them.
That's probably opened a hornets nest, but these things are not decided out of science, they largely depend upon very shakey statistical conjecture.
Enjoy the sunshine.