Because informed consent is bad for business.
*In 1970, Nobel Prize winner Aleksandr Solzhenitsyn observed:
“Let us not forget that violence does not and cannot flourish by itself; it is inevitably intertwined with lying. Between them there is the closest, the most profound and natural bond: nothing screens violence except lies, and the only way lies can hold out is by violence.”
The more odious the violence, the greater the deceit is needed to justify it. Therefore, the defense of partial-birth abortion has required an inexhaustible store of lies.
*http://www.nccbuscc.org/prolife/programs/rlp//97rlpwil.shtml