Episiotomies place control in the hands of the care provider it is a 'known' risk and often speeds up the birth. It is gain gain for the obstetrician. For the woman it can lead to delayed healing and trauma. Evidence points to tearing being overall the better way to go. Of course there are extremes of each which overturn this idea, but on the whole tearing seems to be less complicated than episiotomies.

As someone else stated, you can't take organs from a dead body without consent, but you can cut a woman's vagina without informed consent. Pretty disgusting!