You can't have cervical cancer without a cervix...and only women who have their cervix removed in a hysterectomy have no need for a Pap smear....They still perform the Pap smears on women who have no cervix..
But the legal system has set up a "standard of care" or be sued system until recently. And the "Standard of care" system called for pap smears in post-hyster women.
Would you be willing to be the maverick?
In medicine sometimes they (the insurance companies) drew the line, sometimes you drew the line.
Bottom line, if you were worth your salt, you fought for the best you could give and then some. That was and is risky business.