Define "many partners." A father should have his kid taken away if he dates a lot? Or engages in any activity that might increase the risk of death? Okay, what if the father rock climbs in his spare time? That's an activity that is risky and might condemn one to death. What if the father is a soldier? That's an activity that's risky and might condemn one to death.
When that becomes normalized in a child's mind, it is ok for the child to do it in later years
So, following your logic, the examples I gave above of various activities (rock climbing, soldiering) might normalize those dangerous activities in the minds of a child, so soldiers and rock climbers (among others) are unfit parents.