Doing keels properly is important and do them at red lights. You aren't doing anything else....and no one knows you are doing them.
Pelvic floor dysfunction happens more with coached pushing...like at the hospital when you have an epidural and you can't feel how hard you are pushing? Well, when they count or tell you to push, push, push....you are actually damaging your PC muscle. The research that I have read is that vaginal births without coached pushing significantly decreases that damage.
I've had 4 babies, the largest being 11 pounds - all without drugs. I tell women, "push to the point of comfort". Kegels are important for women AND men. This PC muscle is also one of the primary muscle in orgasms....so the stronger the muscle is, the stronger the orgasms can be.
The surgery is like any other surgery, it can go well or not. Regardless, you need to strengthen the pelvic floor muscles to hold everything up. They can pin everything back up, but years pass and it usually starts happening again. It's best to strengthen what you've got.
A friend of mine got tons of relief doing kegels, but what helped even more was her chiropractor adjusted her uterus....so she lied her down and a used a special table that drops to gently push the uterus north. This with the exercises made a significant difference.