Not that all parents of one child are like this, or even the majority, or probably anything but a teeny-but-annoying minority! But I seem to be running into a lot of them lately! Particularly online, where you can find them solemnly informing everyone who will listen that they would never take their eyes off their child long enough to let it get attacked by a wild boar, or that the parents of that poor girl who got attacked in a bathroom weren't being responsible, and that unlike those people THEY always accompany THEIR child to a bathroom when out in public!!!111
But what if you have... more than one child? you ask. At this point, one can imagine the look of slowly dawning horror spreading over their face as they somehow become aware for the first time ever that such a thing is possible. Then (I imagine) they gradually raise their hands in front of their face and gaze at them sadly like the rock biter in The Neverending Story, suddenly aware of the sheer vastness of the unknowable universe and also the concept of plurals.
Then their heads explode? I assume. Usually these brave parenting warriors only give out their opinions on facebook I just have to go by guessing here.