How can medical professionals not sterilize their equipment?
I'm getting a whiff of lawyer-speak, myself. Making that claim deflects from the obvious, that some doctor with a Ghengis Khan complex was impregnating them all with his own, errr... genetic legacy. If they actually had failed to sterilize equipment, there would be potentially far greater liability, so such an admission if true would be very damaging legally. Ergo, it's not true, it's plausible deniability and deflection.