The post menopause comment is incorrect - still supposed to go in every year or two as cancer risk increases with age more than any other risk factor. I go every year, GYN provides pap smear, low dose hormone therapy that prevents most of the migraines I was having from menopause, and prescription for mammogram. Wish it could be every other year but she says no. I got the recommendation for this doctor originally from a lady who'd had a hysterectomy so even in that case you are supposed to go in and get checked.
It's likely because so very much medical research is done only on men - being a female person is NOT a specialist situation logically as we are more than half the population, but in practice that's how it works. Some women go only to that well woman checkup and no other annual doctor visit.