Newborn sleeps in different room, adult STTN. Will not entertain throughout to sleep train

im genuinely afraid for their baby.. adult sttn while baby in a diff room and WILL NOT entertain thru the night under the pretense of sleep training? that statement in itself shows how selfish they are. what if baby soils his diapers or the diaper is full? what if baby is crying? nb needs feeding every 2 - 3 hrs.. sometimes they might accidentally roll over.. SIDS!! SIDS CAN HAPPEN WHILE THEYRE STTN!! UGHHH SICKENING!!!I hope baby will be safe and sound.. may the angels protect that little darling..