I don't even understand what people are debating. You'd think she went out and gave someone else breast cancer to protect herself judging by the backlash. Alas, what she did has absolutely no effect on anyone other than herself, yet people still find a reason to complain. They're upset over weaknesses in the health care system, I understand that. This has nothing to do with her, though. She didn't put that system in place, nor does she take any action to keep it in place. She simply happened to have another option. Blaming her for that isn't rational if the alternative would have been to sit around waiting to get cancer, knowing she had an alternative, just for the sake of satisfying a bunch of chronically jealous, insecure complainers.
It's also not a rare procedure by any means. She's getting the attention because they're choosing to give it to her. When you can't walk out your front door without it ending up on the news, naturally you will have to publicly defend any major action you take including but not limited to preventive surgery. She isn't trying to get attention, it just comes with the territory. Not speaking about it when fans (and non-fans) are curious about the details of her life would have earned her just as much condemnation.