Some will use it if they are having a particularly active day. Kegels can really help, especially when taught using biofeedback which enables you to see how effectively you are using these muscles and can measure actual strength. About 20 each time - holding to count of five and resting five. This twice per day. I like to work my patients up to a 10 second squeeze, but most can't start there.
Many studies show their effectiveness.
The problem is that most women don't receive adequate teaching to learn how to rehabilitate this damaged muscle. If you had muscle damage anywhere else in your body, you would be sent to a physical therapist or someone who could teach you proper exercise and monitor your progress. I seem to be having some success on my own, but if I don't succeed, I plan to ask to be referred to a professional. But women are expected to locate and fix this muscle on their own. It's not that simple.