Rates are just that, the percentage of people who suffer a certain complication associated with hysterectomy. It's a bit like gambling. You know the chances of winning the lottery are small, but someone does win. For the person who gets the prize, things are great. The rest of us loose our money.
Medical complications are the other way around.
Some people get them, and for those people, there is a very real problem. There have been a variety of papers published on the indications for hysterectomy, a topic I won't get into at this time. However, the complication rates will vary depending on the reason for the surgery. The deeper issue here is the problem of interpreting whole population data for a specific patient. Many, many factors influence complication rates.