Women are fairly frequently given episiotomies. This is intended to prevent vaginal tearing, which is far more harmful than a clean cut and much harder to repair and much more likely to leave a bad scar. Scars in the genitals can be pretty unpleasant. Scar tissue in female genitals tends to not want to cooperate with that whole sex thing.
Furthermore, sutures in the genitals make it impossible to comfortably or safely sit. They can become infected or tear open when you are using the toilet. You are typically given a stool softener to try to reduce the odds of tearing your sutures post partum.
Taking care of sutures in the outer genitals is inherently challenging. You can't see them without help of a mirror and they are difficult to reach for purposes of tending to them.
I imagine sutures across the lower abdomen are, in many cases, a piece of cake compared to that.