That's not entirely accurate. Many experiments were useless, notably Mengele's, but some data collected remains useful (though not necessarily used) to this day

That's not entirely accurate. Many experiments were useless, notably Mengele's, but some data collected remains useful (though not necessarily used) to this day. There were results by others that were applicable, usually regarding weapon development and exposure to elements. And while we're on the topic, the US experimented on their interned populace as well, though with less intent to harm, as did the Japanese (referenced by GP).