I too was under the impression the rupture risk was the problem with the boob job.
So like others, my assumption is that when Simone got implants it was on the basis that she wasn't coming back. Even when the money is no problem, seems daft to put yourself through the pain and recovery time for something you haven't ruled out needing to remove max 18 months later. They take nearly that long to settle properly don't they? Plus she would then presumably want them back in after LA.
None of this precludes her from later changing her mind though. There are so many examples of athletes who clearly did intend to retire and then didn't stick it. Maybe the real test will be how she feels if the US has a poor showing at worlds. How long have we got before it's shit or get off the pot time, end of the year?